ITEM NAME:M2 Heart Rate Smart Wristbands TalkBand Bluetooth 4.0 with Sleep Monito #JT1 Product Description Description: Features: It will record your step,distance and calorie,which can help you to set the target. Functions: Step counts, Distance measuring, Calorie Consumption management, Sleep management, Event trigger (water drinking, taking medicine, meeting etc), call reminder, clock, sedentary reminder, anti- lost (positive and negative direction lookup), remote camera, vibration alarm clock. For Android / for iPhone Smartphones, it can support all the function in the description. Compatible with: Android 4.43 or above, IOS 8.0 or above (For iPhone 4S, 5, 5C, 5S, 6, 6+) Specifications: CPU: Nordic-Nrf51822 Vibration: Mute/Vibration Waterproof: IP67/Life waterproof(Which just can support about washing hand) Platform support: Android 4.3 or above,iOS 8.0 or above Hot spot: dynamic and static heart rate Screen size: approx.0.42 inch Size type: OLED Bluetooth: 4.0 Bluetooth(Low power consumption) Battery type: Polymer lithium battery Charging type: charging clip Control type: Button control,APP control Language: Chinese/English(Other languages can be customized) Color: Black Size: approx. 40 x 15 x 10mm/1.57 x 0.59 x 0.39'' Net weight: approx. 18g NOTE: This wireless smart sports watch is the one must be used with Mobile phone and dedicated APP. please allow 1-3mm error due to manual measurement and there will be different color as different display, please understand. Thanks. Included: 1 x Heart Rate Smart Wristbands 1 x User Manual 1 x USB Charger.Included:1 x Heart Rate Smart Wristbands. Bluetooth: 4.0 Bluetooth(Low power consumption). Hot spot: dynamic and static heart rate. Compatible with: Android 4.43 or above, IOS 8.0 or above (For iPhone 4S, 5, 5C, 5S, 6, 6+).