💓 BLUETOOTH AND ANT+ - Bluetooth 4.0 and ANT+ technology allows to connect with smartphones and tablets, as well as GPS watches by Garmin, Polar and more. , 📈 FEATURES - Track and capture real time heart rate, training zones and calories burned on your smartphone or tablet with compatible training apps. Heart rate range 30-240 bpm. , 📱 APP COMPATIBILITY - Works with 50+ apps including Wahoo RunFit, Zwift, Endomondo, Runkeeper, IpBike, Nike+ Runclub, Strava, Peloton, elite hrv app, DDP Yoga, Runtastic PRO, 60Beat,MapMyWalk and others. , 💦 ADJUSTABLE WATERPROOF STRAP - The strap length is 25.6 inch-37.4 inch (65cm-95cm),can be adjusted to your size. Waterproof IP67. , 🔋 300 HOURS BATTERY LIFE- Ultra low power consumption, the CR2032 coin battery will give you 300 hours.