Feature: 1. Aluminum alloy 35‑key wireless ultra‑thin 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 Keypad Material: Aluminum Alloy Compatible with Bluetooth Version: Compatible with Bluetooth 5.0 Working Distance: 8-10 Meters Battery Capacity: 300mAh Charging Voltage: DC 5V Working Voltage: DC 3.7V Working Current: 1~3mA Continuous Working Time: 100 hours Sleep Mode: 30 Minutes Keyboard No Input, The Keyboard Enters The Sleep Standby State Standby Current: 50uA Standby Time: 180 days of continuous standby Note: 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 Cable Note: 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.