Specifications: Model Number: DM100 Type: On Wrist Smartwatch Function: Pedometer, Heart Rate Tracker, Message Reminder, Interactive Music, Calendar, Dial Call, Push Message, Alarm Clock, Answer Call, Date & Time, Camera, Sound Recorder... Communication Program: 2G: GS: B2+B3+B5+B8 3G: WCDMA: B1+B2+B5+B8 TD-SCDMA: B34/39 4G: LTE-FDD: B1+B2+B3+B5+B7+B8+B12+B20 LTE-TDD: B38+B39+B40+B41(100MHz) System: Android 7.1 OS CPU Model: MTK6739 Quad-core RAM+ROM: 1GB+16GB Screen Size: 2.86inches Resolution: 640*480p Screen Shape: Round Touch Mode: Multi-touch Camera: 5MP Network Mode: 4G Nano SIM Card Slot: Yes BT Version: 4.0 GPS: Yes APP Download Available: Yes Clock Interface: Selectable Recording: Yes Speaker: Yes Waterproof Grade: IP67 Waterproof Battery Capacity: 2700mAh Lithium polymer battery APP Support Language: English Watch Support Language: Chinese Simplified, Chinese Traditional, English, French, German, Spanish, Portuguese, Italian, Russian, Polish, Turkish, Korean, Hebrew, Indonesian, Vietnamese, Arabic, Persian, Thai, Hindi, Burmese, Bangladesh, Japan APP Name: WiiWatch 2 Case Material: Alloy Band Material: Silica Gel Color: Black Item Weight: 155g/5.45oz Package Size: 11.0*9.5*8.0cm/4.33*3.74*3.15in Package Weight: 302g/10.65oz Package List: 1 * 4G Smartwatch 1 * Charging Cable 1 * Screw Driver 1 * Screen Film 1 * User Manual (English / Chinese)