1089A-C For Microsoft Surface pro3 / pro4 / pro 2017 / pro6 / pro7 Universal Magnetic Adsorption Bluetooth 3.0 Keyboard Leather Tablet Case Helmet Mount making every detail clearly visible

making every detail clearly visible

FM (frequency modulation): 87 ~ 108 MHz

Made of high quality ABS composite material

The seat tube sleeve is a tooth buckle structure

Heart Rate Chip: GH3018

1089A-C For Microsoft Surface pro3 / pro4 / pro 2017 / pro6 / pro7 Universal Magnetic Adsorption Bluetooth 3.0 Keyboard Leather Tablet Case Helmet Mount making every detail clearly visible1. Bluetooth 3. 0 standard interface 2. Effective operating distance: 10 meters 3. Modulation method: GFSK 4. Working voltage: 3. 0 4. 2V 5. Working current: less than 2. 5mA 6. Standby current: less than 0. 3mA 7. Sleep current: less than 40uA 8. Charging current: more than 200mA 9. Standby time: more than 100 days 10. Charging time: 2 3 hours 11. Lithium battery capacity: 350mAh 12. Sustainable working hours: more than 100 hours 13. Lithium battery