35 Keys Backlit Keyboard Bluetooth-Compatible 2.4G Wireless Triple Mode Keyboard Specification: Material: aluminum alloy + ABS plastic Support system: Windows, MAC OS, IOS, Android Key number: 35 keys Bluetooth-compatible version: 5.0 Keyboard life (number of keystrokes): 5 million times Response Speed: 30 ms Wireless/Bluetooth-compatible transmission distance: 10 meters Operating voltage: 3.7~4.2V Operating current: Wireless: less than 2mA without backlight, less than 5mA with backlight; Wired 10mA Built-in lithium battery: Yes Battery capacity: 1000mAh lithium battery Usage time: about 500 hours without backlight, about 2.6 hours when the backlight is turned on to the max. Standby time without backlight: >10 months Hibernation: 10 minutes without working, into the eye rest state Wake up: press any key to wake up Product net weight 143g Product size 14*11*cm Digital keypad charging: 1. The numeric keypad contains a high quality rechargeable polymer ion battery. 2. When the battery is low, the indicator light will flash. 3.Charging time: less than 2 hours. How to use(three connection modes): 2.4G connection: Insert the 2.4GHz USB wireless receiver into the USB port of your computer and press esc+2.4G receiver icon to switch to 2.4G mode, and then press the side pairing. Bluetooth-compatible: Press esc+BT to switch to Bluetooth mode, press the side pairing button, open Bluetooth-compatible to find the device with the name "Bluetooth-compatible Keypad" to connect. Wired Connection: Plug in the cable to use, the default wired keyboard after the cable is connected, you need to use 2.4G or Bluetooth when unplugging the cable. Backlight use Turn on the backlight: esc + RGB key (right arrow key) switch backlight: esc + RGB key (right arrow key) backlight brightness: esc + up arrow key, backlight brightness brighten; esc + down arrow key backlight brightness lower Package Included: 1*Numeric keypad 1*2.4GHz USB receiver 1*USB-C cable 1*USB-C to USB A Adaptor 1*Manual Note: There may be slight size deviations due to manual measurement, different measuring methods and tools. The picture may not reflect the actual color of the item because of different photographing light, angle and display monitor.