Built-in chip type: MTK 2501
Bluetooth version: Bluetooth 4.0
ROM: 32MB
Waterproof: Yes
IP rating: IP54
Bluetooth calling: Answering, Phone call reminder,
Phonebook Messaging: Message reminder
Health tracker: Drinking reminder, Pedometer, Sleep monitor
Notification: Yes
Notification type: Wechat, Whats
App Anti-lost: Yes
Alert type: Vibration
Locking screen: 1
Other function: Alarm
Screen: OLED
Operating mode: Touch
Screen Type of battery: Li-polymer Battery
Battery Capacty: About 90mAh
Charging time: About 2hours
Standby time: About 2 - 3
Days Shape of the dial: Rectangle
Case material: TPU
Band material: TPSiV
Compatible OS: Android, IOS
Compatability: Android 4.3 / iOS 7.0 and above system
Language: English, Simplified
Chinese Dial size: 4.8 x 2.2 x 1 cm / 1.89 x 0.87 x 0.39 inches
Band size: 15 x 2.2 cm / 5.9 x 0.87 inches
Product size (L x W x H): 21.50 x 3.70 x 2.20 cm / 8.46 x 1.46 x 0.87 inches
Package size (L x W x H): 9.70 x 9.70 x 7.00 cm / 3.82 x 3.82 x 2.76 inches
Package weight: 0.184 kg
Package Contents: 1 x U3 Smart Wrist Watch, 1 x Charging Cable, 1 x Chinese English User Manual