Keyboard Specification: 1. Key number: 99keys 2. Transmission mode: Bluetooth 3.0/4.0, 2.4G technolgy 3. Power Type: 2*aa battery (Included) 4. Operation voltage: 1.5V 5. Max working current: 50mA 6. Weight: 695g 7. Size: 340*110*18mm 8. Key life: 50 million Mouse Specification: 1. Transmission mode: Bluetooth 3.0/4.0, 2.4G technolgy 2. Wireless distance: 10M 3. Battery: 2*AA Battery (Included) 4. DPI: 1300DPI 5. Tracking speed: 30(inch/s)Max 6. Acceleration: 10g 8. Keys: 3 Buttons+Bluetooth switch key 9. Size: 95*59*36mm Features: 1. Intelligently switch among multiple devices The combo intelligently connects to the working device. They pair multiple devices, and switch among them with ease. They simplify complicated cross-platform use and meet multi-tasking requirements. 2. Switch between Bluetooth 3.0, 4.0 and 2.4 GHz The smart switch between Bluetooth 3.0, 4.0 and 2.4 GHz ensures stable wireless transmission. You can still use the combo regardless of USB port shortage or the loss of receiver. 3. 5.6 mm ultra-slim design with aluminum alloy base The ultra-slim body is made of anodized aluminum and is only 5.6 mm thin. The scissor-key technology ensures perfect and accurate keystrokes. 4. Multimedia hotkeys Multimedia hotkeys give you quick access to functions like media player, homepage, volume adjustment and more. 5. Long battery life With Rapoo's latest energy saving technology, you can use your keyboard for up to 12 months and the mouse for 9 months without power interruption. 6. Silent design This is a wireless noiseless keyboard mouse combo, Silent switches reduce click noise, help you create a quiet working environment.