Retro Wireless Keyboard, Bluetooth/USB Mechanical Keyboard with Four Different Backlit Settings and Auto-Sleep Model, Backlit Keyboard Work with Mac & Windows and Android & iOS, Pair up to 3 Devices

Number of Keys: 79 (Mechanical Switch) Number of Multimedia Keys: 12 Keycap Material: PC and ABS Key Switch: Gateron Blue Backlit: White LED Battery: 4,000mAh Li-ion Rechargeable Battery BT Working Time (Backlit 40%): Around 3 weeks (Single Charge) BT Working Time (Backlit 70%): Around 2 weeks (Single Charge) BT Working Time (Backlit 100%): Around 1 week (Single Charge) Charging Time: Around 5 hrs (USB 3.0) Charging Port: Micro USB Mode: Bluetooth/Cable Bluetooth Operating Distance: Up To 10m (Open Space) Size: 296.6*144.5*30.6mm Weight: ~ 800g