Letsfit Fitness Tracker Activity Tracker with Heart Rate Monitor Pedometer Watch with Sleep Monitor Step Calorie Counter IP68 Waterproof Smart Bracelet for Women Men

Letsfit Fitness Tracker, Your first choice for a reliable fitness partner Please keep your smartphone and VeryFitPro app connected, and Bluetooth is on. Compatibility: iOS 9. 0 or above/Android 4. 4 or above (for use with Smartphone only, Not suitable for PC or tablet) More Functions: Activity tracking: supports 14 different sport modes Heart rate and Sleep Monitoring: Fitness watch tracks your real-time heart rate automatically and tracks your sleep quality at night(deep sleep/light sleep/awake sleep via our VeryFitPro app) Sedentary reminder: If you rest for too long, your device will vibrate to remind you to stand up and exercise, a great combination of work and rest. Smart notifications: call/SNS Notifications from Facebook, Twitter, WhatsApp, LinkedIn, Instagram etc. Wrist strap Size: Adjustable one size strap fit for Men, women, and children. Model No. : ID151 Sync: Bluetooth 4. 2 Battery Capacity: 90mAh Working Voltage: 3. 7V Working Temperature: -20?-40? Weight: 0. 85oz(24g) Water Resistant Rating: IP68 Working Time: 5-7 days USB Charger Requirement: DC USB port(5V-500mA) Charging Time: 1-2hr(s)