2.4G wireless connection, up to 10m transmission distance, stable signal transmission, no driver required, plug and play. 35 keys, compact layout, easy to carry and use. Ergonomic design, fit your fingers, relieve fatigue and improve work efficiency, comfortable typing. Wide compatibility, support for , for Android, for OS systems. Suitable for cashier desk, bank, financial accounting, business office, shopping mall, etc. Built-in 250mAh rechargeable lithium battery, long endurance time, easy to charge with USB cable, no need to change the battery. Type: Numeric keyboard Key number: 35 Connection method: 2.4G Transmission distance: 10m Supported OS: for , for Android, for OS Input: 3.3V Wake up time: 2s Battery capacity: 250mAh Standby time: About 60 days Colour:Black Material:ABS Package Contents: 1 x 2.4G Wireless Numeric Keyboard Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.