With Bluetooth 3.0, the authoritative in the field of Bluetooth is no doubt compatible with 1.0 2.0 3.0 4.0 Bluetooth device Energy supply: double seven batteries( Without battery) With power switch, when not in use can turn off the power, saving energy. Ultra-thin design, the main thickness of only 6.7mm Keys with scissors foot structure, feel good 78 key design, with 7 multimedia keys Beautiful appearance, fashion, very fine. Compatible with all Apple IPA models, Apple system Microsoft system Andrews system without the need for driver, as long as the Bluetooth function can be installed directly Color: silver + grey Material: metal + plastic Product Size: 28.5 * 12 * 1.8cm Package Contents: 1 * wireless keyboardOnly the above package content, other products are not included. Note: Light shooting 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.