BESSKY D21 Sport Bluetooth Smartwatch Sleep Heart Rate Monitor Health Tracker Bracelet _ Black
D21 Sport Bluetooth Smartwatch Sleep Heart Rate Monitor Health Tracker Bracelet Hardware: Built-in chip type: NRF51822 Bluetooth version: Bluetooth 4.0 Waterproof: Yes IP rating: Life water resistance Functions: Bluetooth calling: Phone call reminder Messaging: Message reminder Health tracker: ...