Note: The perimeter of Bracelet Watch is more than 17cm， the smart bracelet is suitable for the wrist of 14 �C 17cm perimeter.Overview: Have you ever missed out phone calls because you almost can not hear your phone ring tone? Our bluetooth bracelet will bring you the confidence that you bought the best!Description: Many people have their phones in their hand bags and don't feel the vibration or even hear their ring tone in busy areas. With this awesome bracelet you can have a wearable fashion accessory and never miss a call again. Caller ID and LED Time Display This beautiful bracelet also displays the caller ID， so you can see the phone number of the person calling， instead of having to struggle opening your bag in a busy area， you can instantly tell if the call is important or not. Another great feature of this bracelet is that it features a time display.Unlike most wireless techniques， bluetooth uses time division duplex to arrange the transmission slots so that it can avoid collision.The top-rated 250mAh battery enables you run into the bracelet for 168 hours constantly.It is also the best gift for your family and friends.Main Features: Best partner of cell phone (Android version)， anti-lost alert Paring with Bluetooth， answer call by a button Specialty design， elegant and fashionable Easy to operate and convenient to wear APK， used for reading synced SMS only works for Android phones， can be downloaded through the after sale center of our siteThe bracelet is charged through standard Micro USB input portDownload the app: http://pan.baidu.com/s/1pJmEB71 http://pan.baidu.com/s/1o6Noy74 Product Note: The watch charging port's installation has slight deviation， but does not affect use. Need to pay attention to plug or pull out a USB line， aligned with the position， so as to avoid damageNote: For iPhone， it only supports Bluetooth calling function. People: Unisex table Watch style: Fashion&Casual Available color: Black Shape of the dial: Arch Movement type: Digital watch Display type: Digital Screen: OLED capacitive touchscreen display Pedometer: 3D gravity sensor gyro Memory: 32M Speaker: 0.9W microphone: 38DB flat vibration motor: 8 x 2.7 mm Bluetooth version: 3.0 Battery capacity: 250mAh Charge time: 2-3 hours Standby time: 168 hours Charging: DC 5V / 1A (Please check the charger when charging specification) Charging interface: Universal standard for micro USB The dial thickness: 1.2 cm / 0.5 inch The dial diameter: 2.9 cm / 1.1 inch Product weight: 0.144 kg Product size (L x W x H) : 7.3 x 6.0 x 2.9 cm / 2.9 x 2.4 x 1.1 inches Package contents: 1 x Watch， 1 x Holder， 1 x Manual， 1 x USB Cable