Note: For iPhone,it only supports part of the function as Pedometer, Calendar, Call Sync, Calculator, Clock, Stopwatch. 
Note: this smartwatch is not waterproof. 
SmartWatch U8 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. 
model:U8 
1.48 inches; Capacitive Touch Screen TFT LCD 
Time/Date/Week/Battery state display 
Ringing reminder when you receive a call 
Ringing reminder once your mobile phone disconnected 
Display the number or name of incoming calls 
Answer or Dial calls from watch 
Support hands-free calls, phone book 
Play the music in your phone 
Sync SMS/call history(only for android phone, you need download apk) 
Ring reminder when your smart phone receive a message (including Wechat, Facebook, Twitter, WhatsApp, Skype, and so on.(Only for android phone.) 
Anti-lost alarm function: When cellphone left watch alarm automatically, after a certain distance to avoid lose the phones 
Remote taking photo function: You can control your cellphone to take photo from the watch.(only for android phone) 
Stopwatch, Altitude Meter, Passometer, Photograph, Barometer, Vibration 
Bluetooth Version: V3.0+EDR 
Bluetooth Protocol: A2DP + HFP 1.5 + HS P 1.2 
Range of Frequency: 2.4GHz spectrum 
Ambient Noise: ≤75dB 
Transmitting Range: ≤10m 
Language: English, French, Spanish, Portuguese, Korean, Italian, German, Indonesian, Finnish, Thai, Turkish, Russian, Arabic, Swedish 
Charging Time: about 1 hour 
Talk Time: about 3 hours 
Music Play Time: about 6 hours 
Standby Time: about 160 hours 
Power Supply: Built-in 230mAh rechargeable battery 
Package includes: 
1 x Bluetooth Watch 
1 X usb cable(not included plug) 
1 x User Manual