Smart Health Walking FIT

What smartphone does this bracelet sync with?
The BOI smart bracelet support IOS7.0(and above)and Android4.3(and above)phone which with Bluetooth 4.0.
such as: Iphone 4s/5/5c/5s/ipad 3/ipad 4/ipad mini/ipod touch5 or above,
Samsung Galaxy Grand 2 / Note 2 / Note 3 / S3 / S4 / S5,
Sony Xperia VC / Z / Z1 / ZL, LG Nexus 4 / 5 ,
HTC one / M8 ,
Motorola Moto G / X ,etc.
How to charger this bracelet?
The BOI smart bracelet host comes with a standard USB port,you can insert it into PC or power bank USB port directly.
(The first time charging,please plug it into a wall charger to charge it for over 2 hours , and when it was not charged for some days, please plug it into wall charger too,because when the battery gets empty,PC(low drive) may be can not make it turn on.)

Product features
1. Tracks steps, distance, calories burned and monitor how well you sleep.
2. Call reminder(you will never miss any incoming call).
3. Syncs via with iOS and Android(APP).
4. Wakes you (and not your partner) with a silent wake alarm.
5. have function of water dispelling, can not be putted into water.

APP name: Zeroner
(On Zeroner, you can connect with friends to share and compete on fitness goals.)

Specifications
1. Dimensions:69.1 x 15.8 x 11.2mm(W x D x H)
2. Battery life:72H(but the more function be opened, the bigger power consumption it will become )
3. Net Weight:23g
4. Screen:0.49 inchs OLED Display
5. Battery type: 40mAh Li-battery

Package details
1 * Bracelet
1 * User Manual