Feature:1. Aluminum alloy 35key wireless ultrathin external universal numeric keypad, compatible with Bluetooth 5.0.2. Dual system settings, support for Windows8/8.1/10 and for Mac OS system, asynchronous link design, does not interfere with computer operating.3. For MAC OS mode, you can set for F13~F19 keys to any shortcuts recognized by the system.4. 30 minutes keyboard no input, the keyboard enters the sleep standby state.5. Can work continuously for 100 hours, continuous standby for 180 days.Specification:Item Type: Numeric KeypadMaterial: Aluminum AlloyCompatible with Bluetooth Version: Compatible with Bluetooth 5.0Working Distance: 8-10 MetersBattery Capacity: 300mAhCharging Voltage: DC 5VWorking Voltage: DC 3.7VWorking Current: 1~3mAContinuous Working Time: 100 hoursSleep Mode: 30 Minutes Keyboard No Input, The Keyboard Enters The Sleep Standby StateStandby Current: 50uAStandby Time: 180 days of continuous standbyNote: The use of multimedia buttons, the symbols at the top indicate the function of these buttons for win mode, the symbols at the bottom (for F13~F19) indicate their functions for mac mode..Package List:1 x Numeric Keypad 1 x User Manual 1 x Data CableNote:The use of multimedia buttons, the symbols at the top indicate the function of these buttons for win mode, the symbols at the bottom (for F13~F19) indicate their functions for mac mode.