DY-M10ReL-S 2 in 1 Removable Bluetooth Keyboard + Protective Leather Tablet Case with Backlight & Holder for Lenovo Tab M10 FHD REL 1. Using chips, stable performance. 2. Built-in 350mA lithium battery, can be used continuously for 60 hours (5 hours of continuous use when the backlight is turned on). To 3. With Micro USB cable for charging, about 3 hours of charging 4. Sleep function, if no operation is performed, the keyboard will automatically enter the power saving mode within 15 minutes 5. Applicable to Apple, Android, and Windows for universal or single-system use. 6. 59 button design, with 14 IPAD shortcut function keys. 7. The buttons have been silk-printed with UV peritoneal treatment, which is durable and will not fade after 5 million rubs and knocks. The surface of the keyboard adopts wire drawing process, which is very textured. 8. Scissor button design, sensitive typing, quick response and good hand feeling. 9. Modulation mode: GFSK 10. Working voltage: 1.8-3.6V 11. Charging time: 3 hours 12. Lithium battery capacity: 350mA 13. Sustainable use time: 60 hours (5 hours of continuous use when the backlight is turned on) 14. Lithium battery life: 3 years 15. Standby time: 30 days 16. Size: 248mmx150mmx6.4mm 17. Net weight: 460g