Main Features:1. Best partner of cell phone， support answer / call / hang up， built-in Speaker and Mic to answer calls directly 2. Paring with Bluetooth 3.0， start up sport pedometer， display caller ID， missed/dialled/received call， message， 3. Support play mp3 directly and music sync with smart phone 4. Specialty design， elegant and fashionable 5. Sound record function， hourly remind， phonebook. 6. Compatiable with smartphones which use Google android， For iphone ios， windows phone， Nokia Symbian， Blackberry OS systems. 7. Easy to operate & convenient to wear Product Description1.Bluetooth version: 3.0 2.Screen: OLED Capacitive touch screen display 3.Pedometer: 3D Gyroscope gravity sensor 4.Memory: 32M 5.Speaker: 0.9W Microphone: 38DB 6.Flat vibration motor: 8 x 2.7 mm 7.Communication frequency: 2.4GHz 8.Normal charging time: 2-3 hours 9.Standby time: 168hours 10.Battery capacity: 250mAH 11.Charging: DC-5V 1A 12.The dial thickness: 1.2 cm / 0.5 inch 13.The dial diameter: 2.9 cm / 1.1 inch Package list:1x Smart bracelet 1x User manual1x USB cable Note:1) The perimeter of Bracelet Watch is more than 17cm， the smart bracelet is suitable for the wrist of 14 �C 17cm perimeter. 2) For iPhone， it only supports Bluetooth calling function， No Sports Pedometer，no Music Player，no Message reminder.Thank you.