Description This watch has two working mode.One is company mode(Bluetooth), It enable to make call or receive call or send or get message via Bluetooth The other one is Network mode(Sim Card inserted) It enable to make call or receive call and send or get message via the sim card you inserted which means at this time this watch works as a real cellphone,you can hang out without your cellphone. Specification CPU: MTK6261D SIM Card: Single SIM Card (Micro SIM Card) Frequency: GSM 850/900/1800/1900 MHz Bluetooth: Bluetooth 3.0 Storage: RAM 32M, ROM 32M; External memory: Support TF card up to 32GB Display: 1.3 inch TFT LCD, 240 x 240 pixels Music/video: Support Hand-writing: Support Picture Format: JPEG, GIF, BMP, PNG Music Format: MP3, WAV Video Format: MP4 Languages: English, Italian, German, Dutch, Spanish, French, Polish, Turkish, Portuguese, Russian Functions: Bluetooth Dialer, Contacts, Call Reminder, Clock, Anti-loss, Pedometer, Sleep Monitor, Sedentary Reminder, Calendar Battery: 280 mAh Talk Time: 3 Hours Standby Time: 180 Hours SMS: Support USB Port: Mini USB 5pin interface Size: 90*90*80 (mm) Product Weight: 55g Gravity Sensor: Support Note Sync function:synchronizes Phonebook,synchronizes phone calls,synchronizes incoming calls,synchronizes messages.Smart Watch is able to receive push notifications from QQ, wechat, twitter etc.(This feature is only available to Android)