ST870S For Samsung Galaxy Tab S7 T870T875 11 inch 2020 Ultra-thin Detachable Bluetooth Keyboard Leather Tablet Case with Stand & Sleep Function & Backlight 1. Using high-quality chips, stable performance. 2. Built-in 480mAh lithium battery for 60 hours(The backlight can be used continuously for 5 hours). 3. Charge with Micro USB cable and charge for about 4 hours. 4. Sleep function, if no operation is performed, the keyboard will automatically enter the power saving mode within 15 minutes. 5. 59 button design with 14 iPad shortcut keys. 6. The button is screen printed by UV peritoneal treatment, durable, 5 million times of friction and knocking does not fade. 7. The keyboard surface is brushed and very textured. 8. Scissor foot button design, sensitive typing, quick response, good feel. 9. The keyboard is made of ABS and the leather case is made of fine sheep grain PU leather. Product Specifications: 1. Modulation mode: GFSK. 2. Working voltage: 3.0-4.2V. 3. Charging time: 4 hours. 4. Lithium battery capacity: 480mAh. 5. Sustainable use time: 60 hours. 6. Lithium battery life: 3 years. 7. Standby time: 30 days. 8. Bluetooth interface: 3.0 standard interface 9. Effective operating distance: 10m