Size and Wear Options
Tandem Mobi: Tandem Mobi is the world’s smallest, durable AID automated insulin delivery system1 (approximately half the size of t:slim X2 pump) and can be used with a 5-inch infusion set and adhesive sleeve for on-body wear. Designed for easier cartridge refills, Tandem Mobi also works with all Tandem infusion sets and can be worn almost anywhere,†† giving you greater discretion, comfort, and options for how you manage your diabetes. Wear it, clip it, slip it!
t:slim X2 pump: The t:slim X2 insulin pump lets you choose from more than 30 mix-and-match infusion set options. While it doesn’t offer on-body wear, the all-in-one system is up to 38% smaller than the Medtronic 780G‡‡ and can easily be clipped to a waistband or slipped into a pocket.
Bolus Delivery
The Quick Bolus feature allows you to manually deliver insulin without needing to unclip or take your Tandem Diabetes Care insulin pump out of your pocket. The Tandem Mobi system and t:slim X2 insulin pump each have a physical button that can quickly deliver a bolus for a preset amount without using your smartphone, which can be an important option for discreet diabetes management or when your smartphone isn’t nearby. For Tandem Mobi, full bolus customization happens in the app.
Insulin Capacity
Tandem Mobi: The 200-unit reservoir on the Tandem Mobi system is what gives it its smaller design
t:slim X2 pump: The t:slim X2 pump has a 300-unit reservoir that is a great fit for users with higher daily insulin needs
Our users find they’re less likely to leave home by mistake without their insulin with a Tandem insulin pump, something that was prone to happen when they were using pens or multiple daily injections.
Water Exposure Rating
The Tandem Mobi system (pump + cartridge) is waterproof at the time of manufacture. It is rated IP28, tested to withstand submersion up to 8 feet (2.44 meters) for up to 2 hours. This is among the highest water exposure classifications available on an insulin pump today.
Temperature guidance: Your pump should not be worn in hot tubs, whirlpools, or saunas to avoid exposing the pump and insulin to high temperatures.
Take care not to wear your pump in situations where the pump could fall off and be lost.
Over time, the moisture protection capabilities of the pump may be compromised by incidental bumps, drops or other unintentional events the pump may be exposed to over time under normal use conditions.
ALWAYS inspect your pump for damage. If there are signs of fluid entry, discontinue use of the pump and contact Customer Technical Support - 877-801-6901.
With Tandem insulin pumps, you have the option to temporarily disconnect. The Tandem Mobi design makes this simple and disconnecting is quick: Unclip the infusion set from your site, set the pump aside, and reconnect when you’re done. Many users find the workflow a natural part of water activities.
If you use the Stop Insulin feature while disconnected, Tandem pumps record the suspension. When you reconnect, Control-IQ+ technology incorporates that history into its predictions and adjusts accordingly.
We publish the validated specifications for depth/duration of the water-exposure rating of the t:slim X2 insulin pump here.
Rechargeable Battery
Tandem Diabetes Care is the only company with multiple insulin pumps that use rechargeable batteries, and we’re proud to do our small part to help reduce the number of disposable batteries going into our landfills. Tandem recommends charging your insulin pump each day for 10-15 minutes, which can be done while you’re disconnected for a shower, or until it’s fully charged.
Tandem Mobi: The Tandem Mobi system uses inductive wireless charging (AC adapter with charging pad is included with the pump). The battery life on a single charge for the Tandem Mobi System will typically last between 3 and 5 days, depending on your use.
t:slim X2 pump: The t:slim X2 pump charges via micro-USB cable. A full charge on the t:slim X2 pump will typically last between 4 and 7 days, depending on individual usage (e.g., insulin delivery, CGM, frequency of alerts and alarms). For example, if you utilize both CGM and the Tandem t:slim mobile app, a fully charged battery is designed to last up to 4 days.
Color Touchscreen
The color touchscreen on the t:slim X2 pump makes it a great all-in-one solution for insulin pump therapy. This on-device interface allows for quick access without a smartphone, making it a great option for non-smartphone users.
Able to Temporarily Disconnect
All Tandem pumps give you the ability to temporarily disconnect the infusion set from your site location when desired, such as for water activities, contact sports, or intimacy. Simply unclip the pump from clothing, take it out of your pocket, or remove it from the adhesive sleeve if you use the Tandem Mobi system. Reconnecting is a snap! Tandem users who play professional football cite this as a key reason why they chose Tandem.
When disconnecting, Tandem recommends using the “Stop Insulin” setting on the pump. This tells Control-IQ+ technology that delivery is intentionally paused and ensures accurate logging. Use “Resume Insulin” on the pump. Control-IQ+ immediately incorporates the suspension history into its predictions and adjusts delivery accordingly.
Smartphone Control
Tandem Mobi: The Tandem Mobi system offers full smartphone control,‡ allowing you to manage your insulin delivery directly from a compatible, personal smartphone for enhanced comfort, convenience, and discretion. No need to interact with the pump itself.
t:slim X2 pump: The t:slim X2 pump has partial smartphone control that allows you to bolus directly from your smartphone (also called mobile bolus).§ It also has a physical button and pump touchscreen option so you can quickly deliver a bolus for a preset amount without using your smartphone, which can be an important option for discreet diabetes management or when your smartphone isn’t nearby.
Learn more about Tandem mobile apps.
Control-IQ+ Technology
Tandem insulin pumps are powered by Control-IQ+ technology, an advanced hybrid closed-loop system and the only predictive algorithm with AutoBolus. Control-IQ+ with AutoBolus has demonstrated better A1c results, even for people who occasionally miss meal boluses.4 Control-IQ+ technology increases basal insulin dosing and uses AutoBolus (up to one an hour)§§ if sensor glucose is predicted to be high. Control-IQ+ can decrease or stop basal insulin if sensor glucose is predicted to be low. Control-IQ+ is shown to reduce A1c by 0.9%,4 add 2.8 more hours per day time in range,5 and users see improvements on Day 1.5 Control-IQ+ can also improve time in range for people living with type 1.
Tandem AID systems have been peer-reviewed in more than 115 manuscripts. There are more than 440,000 Tandem AID users worldwide with more than 400 million patient days.1
Dedicated Sleep Setting
Tandem pumps are the only insulin pumps with a dedicated Sleep Activity — a Control-IQ+ setting built specifically for overnight glucose management, not a general-purpose algorithm running the same targets 24 hours a day.
During Sleep Activity, Control-IQ+ uses a lower and tighter treatment range to help guard against lows and highs, and pauses automatic correction boluses, so users aren’t woken by insulin delivery. Set a Sleep Schedule once, and the mode runs automatically on the nights you sleep. Real-world data from t:slim X2 pump users showed 90% overnight time in range.6
Dedicated Exercise Setting
The Exercise Activity on Tandem pumps with Control-IQ+ technology is designed to help manage blood glucose during physical activity by adjusting basal insulin delivery based on continuous glucose monitoring. It works by setting a tighter and higher glucose range. When enabled, Control-IQ+ uses a narrower and higher range of treatment values to help guard against lows during activity. It uses a tighter treatment range of 140–160 mg/dL to decide whether to increase or decrease basal insulin, and a predicted value of 80 mg/dL to determine when to stop basal insulin. Users can program their Tandem pumps to automatically switch off the Exercise Activity by setting a custom duration with the Exercise timer.
Remote Software Updates
Diabetes technology evolves at a rapid pace. That’s why Tandem pumps get updated, not outdated. Tandem offers pump users the opportunity to add new features via remote software updates* during the warranty period of a Tandem insulin pump without the need to purchase new hardware. This ensures access to the latest software that allows pump users the opportunity to add new features when available without purchase or hardware swap. It also ensures access to the latest software/algorithm. An in-warranty pump is required and updates may require additional training.
Automatic Data Sharing with Provider
Wirelessly upload your pump and therapy data to the cloud-based Tandem Source platform† and allow your authorized healthcare provider easy online access.
Our mobile apps require a compatible smartphone model and operating system (sold separately). For t:slim X2 insulin pump users, bolus delivery also requires an app update, a remote software update on the pump, and additional training.
iOS & Android Compatibility
Tandem insulin pumps are compatible with both iOS and Android smartphones with ongoing updates to expand compatibility. When paired with a compatible smartphone, the Tandem mobile apps allow you to conveniently view key pump information, including basal and bolus events, insulin on board, carbs, current settings, and pump and sensor status directly from your smartphone.^^
Smartphone capabilities vary by pump:
Tandem Mobi: Offers full smartphone control,‡ allowing you to manage your insulin delivery directly from a compatible personal smartphone for enhanced comfort, convenience, and discretion. No need to interact with the pump itself.
t:slim X2 pump and Tandem Mobi: Enable bolus delivery from your smartphone,§ giving you the freedom to deliver insulin discreetly without handling your pump.
Dexcom G7 CGM Sensors
The Tandem Mobi system and t:slim X2 insulin pump are compatible with the Dexcom G7 CGM systems, offering up to 10 or 15 days of wear depending on the sensor.^**
FreeStyle Libre 3 Plus CGM Sensor
The Abbott FreeStyle Libre 3 Plus sensor integrates with the t:slim X2 insulin pump^ and offers sensor wear up to 15 days.
30+ Infusion Set Options
An infusion set is a complete tubing system, changed every 2-3 days, which delivers insulin from the pump to your body. Insulin flows from the insulin pump through thin, flexible tubing that is available in a variety of lengths. A very small, steel needle or soft tube (cannula) is inserted under the skin and secured with an adhesive patch. Insulin is delivered subcutaneously through this infusion site. Finding the right infusion set is an important part of successful insulin pump therapy. Choose from different insertion angles and a variety of tubing lengths. Your choice will depend on your height, site location, daily activities, and other preferences. Switching from a different brand? Even though infusion sets are labeled under different brand names, many are produced by the same manufacturing company. To learn more, see a list of infusion sets and the identical Tandem equivalent, and watch an introductory video.
Using a pump reduces the number of injections to the skin for insulin delivery from an estimated 1,460 injections per year to 112 infusion set changes.***
5-inch Infusion Set for On-Body Wear
The Tandem Mobi system can be worn on-body with the 5-inch AutoSoft XC infusion set, giving you more wearability options beyond clipping it to clothing or slipping it in a pocket.
Seagrove Partners, a healthcare market research and competitive intelligence firm, reports that survey responses positioned Tandem:2
#1 rated in overall satisfaction by healthcare providers
#1 rated in clinical outcomes
#1 rated in customer service
#1 rated in reducing the burden of living with diabetes
#1 rated performance of AID algorithm
(Seagrove Partners HCP Perspectives (Devices), September 2026 Insulin Delivery Section N=83.)