Great Notice:Recently、 many sellers sell ST chip U9、 not MTK chip. As you all know、 MTK is a large chip manufacturer、 there are many mobile phones use MTK chip like Lenovo、 Xiaomi. ST has little experience in mobile phone chips、 so it is not stable. Our company use ST before for the consideration of the cost、 but find it not stable、 sometime may meet the system halted problem. So when you purchase、 do remember to choose the MTK chipBluetooth Smart Watch WristWatch Watches U9 U Watch for iPhone 4/4S/5/5S Samsung S4/Note 2/Note 3 HTC Android Phone SmartphonesThis is a new Bluetooth Smart U Watch which is compatible with all Bluetooth V2.0 or above enabled smartphones、 tablets and PCs (support Android 2.3 or above)、such as iPhone 4、 4S、 5、 5S、 Sumsung S3、 S4、 Note 2、 Note 3、 Note 4 etc.Specifications:1. Material: Steel + Silicon2. Bluetooth Version: Bluetooth V3.0+EDR3. Bluetooth Protocol: A2DP + HFP 1.5 + HS P 1.24. Range of Frequency: 2.4GHz spectrum5. Ambient Noise: ¡Ü75dB6. Transmitting Range: ¡Ý10m7. Language Support:8. New version: English、 French、 German、 Turkish、 Russian、9. Charging Time: about 1 hour10. Talk Time: about 3 hours11. Music Play Time: about 6 hoursFeatures:1. 1.48" Capacitive Touch Screen TFT LCD2. Time / Date / Week / Battery state display3. Ringing reminder when you receive a call4. Ringing reminder once your mobile phone disconnected5. Display the number or name of incoming calls6. Answer or Dial calls from your wrist7. Stopwatch function:8. Support hands-free calls、 phone book9. Play the music in your phone (after Bluetooth paring)10. Sync SMS/call history(only for android phone)11. Ring reminder when your Android 2.3 or above smart phone receive a message (including Wechat、 Facebook、 Twitter、WhatsApp、 Skype、and so on)12. Anti-lost alarm function: When cellphone left watch alarm automatically、 after a certain distance to avoid lose the phones13. Remote taking photo function:You can control your cellphone to take photo from your wrist. (only for android phone)14. Altitude Meter、Passometer、Photograph、 Barometer、 Vibratio