WATERPROOF, SHOWROOM BOX, ONLY BLACK BELT ? *Bluetooth 4.0 + 5.0 LE* ( Dual Connectivity ) ? *Optical Heart Rate Sensor* With Dynamic Heart Rate Real Time Monitor ? Different *Sports Activities* To Calculate *Heart Rate / Calorie Count* ? *BT Calling* / Message / WhatsApp / WeChat Notification ? Metallic Aluminum Body ? *Battery Backup Standby Time Upto 1 - 2 Days** ? *Charging Time Upto 2 to 3 Hours* ?? Wireless Pinned Charger Holder New Technology