Main Features:- Bluetooth 4.0
- Hands-free calling function: Built-in speaker and mic， convenient to answer the call when driving
- Selfie and anti-lost (only support Android)， voice broadcast name， pedometer， calories consumption， sleeping monitoring， drinking reminder， information reminder， etc.
- Built-in gravity sensor， it can bright the screen by swing your arm or tapping the screen twice lightly
- IP54 waterproof grade， only allowing wash hands or face
- OLED screen size: 0.91 inch， resolution: 128 x 32 pixel
- QR code download: For Android users - For iOS users - 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，WhatsApp
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 People: Male table 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: 0.21154 kg Package Contents: 1 x U3 Smart Wrist Watch， 1 x Charging Cable， 1 x Chinese English User Manual