Specification CPU:                              MTK6580, 1.3GHz, Quad Core                                                                         Operating System:    Android 5.1 Memory:    DDR3 1GB,EMMC:16GB (Actual:about 13GB) SIM Card:    Nano SIM Requency Band:    2G GSM   850 / 900 / 1800 / 1900 3G WCDMA 850/2100 Touch Screen:     AMOLED 1.39inch full round screen, Resolution: 400*400 Camera:    HD, 2MP Bluetooth:    BT 4.0 low power consumption WIFI:    802.11b/g/n GPS:    Support Heart Rate Monitor:    Support Pedometer:    Support Data Interface:    POGO PIN Battery:    350mAh Power Saving Mode    About 5-6hours Using Time:    About 3 hours Charge Time:    About 3 hours (Use a 5V USB adapter to charge at least 3 hours for full charging) Water Resistance:     Water Resistance: Life Waterproof (Sweat, small raindrops not afraid, but don't flush, bubble water, bathing, etc.)        Language:    Simplified Chinese, Traditional Chinese, Japanese, Korean, English, French, Russian, German, Portuguese, Arabic, Persian, Italy, Portugal, Turkey, Thailand, Vietnam, India, Indonesia, Spain, Polish, Hebrew Phone Asistance Android Phone:    Support Android 4.4 or above Phone IOS Phone:    Support IOS 9.0 or above Phone Watch Details Dial Diameter:    app 44.5 mm Dial Thickness:    app 13 mm Band Width:    app 23 mm Band Length:    app 260 mm, Adjusted range: 175-240mm Package List:    1 X Smart Watch 1 X USB Cable 1 X Dock 1 X Screwdriver 1 X User Manual