Features: 1. 0.96 Inch TFT LCD Color Screen: Color large screen display bracelet in sports bracelet, IPS color screen high screen HD display, clear visible under the weak sunlight, sensitive touches, one-touches, you can easily open the bracelet. 2. 24-Hour Real-Time Heart Rate Monitoring: During exercise, the bracelet will accurately monitor the heart rate for 24 hours, with four heart rate lights, one of which is an infrared light, which can accurately measure the black heart rate. 3. Long Standby and Ultra Low Power Consumption: Built-in 100mAh capacity polymer battery, normal use 8-10 days, it can stand for 15 days to achieve long standby and ultra low power consumption. 4. USB Direct Charge: You only need to open the bracelet to not directly plug in the USB charging. The charger bracelet is integrated, simple and convenient, and the charging time only takes 1-2 hours. 5. IP67 Level Waterproof And Dustproof: It features display interface style and function display UI design. Parameters: Model: Z21 PLUS APP compatible: for Android 4.4 and above, for iOS 8.0 or above CPU: DIALOG14585 Sensor: Gravity sensor BMA421 Heart rate sensor: VC8201 Bluetooth: BLE4.2 Waterproof and dustproof: IP67 Screen size: 0.96 Screen type: TFT LCD color screen Material: Upper case: PC, Wristband: TPE Size: about 260*20*12mm/10.24*0.79*0.47in Battery type: Built in battery Battery capacity: 100mAh Work life: working time 15 days Charging mode: USB port direct charge Charging time: 1-2 hours APP name: Gloryfit app APP language: Russian, Indonesian, German, Italian, Japanese, French, Simplified Chinese, Traditional Chinese, English, Portuguese, Spanish, Arabic, Korean Push support language: full font Function:Passometer Language:English Compatibility:All Compatible-- Touch Screen:Yes Waterproof Grade:Life Waterproof Band Material:Silica-- Screen Type:Color LCD Package List: 1 x Smart Bracelet USB direct charge, bracelet charging 1 x User Manual