Unique smart watch + Bluetooth headset 2-in-1 design, the bracelet is also a Bluetooth headset, which can listen to songs played by the mobile phone, injecting motivation into users' daily life and exercise You can measure the actual blood pressure and blood oxygen, and save the measurement data and record it at any time Whether indoor or outdoor running mountaineering, click to start/pause, track exercise time and generate calories, and explore the wider traceless world The bracelet monitors your light and deep sleep duration, giving you a better idea of your sleep quality Waterproofing for daily life, supports hand washing, rainy day wearing Specifications: Product name smart band Model No. K13 Screen size 1.14" TFT color screen Interactive Mode point-touch Resolution? 135*240 talk time 4.5H Normal use 60H Charging time 2H Standby time 7days Battery 100mAh FLASH 4M+32M Systemrequirements Available on the following devices: IOS, Android and all types of smartphones Bluetooth; IC Bluetooth 5.2; BT8918C Product Material Plastic electroplating Basic Functions Calling, Phone calls reminding, Audio player, Heart Rate, Blood pressure, Blood oxygen,?Calories burned, Sleep Monitor, Pedometer, Smart Wake-up, and so on Certification ROHS, CE,?Quality Testing Report?