5.[ Warranty and Support ] - We can offer you 1 year worry-free warranty and 30 days no reason money back! Without hassle.If you have any questions, please feel free to contact us. 4.[ Long Battery Life ]- The ergonomic wireless keyboard is powered by 2 AAA battery, and the wireless mouse is powered by 1 AA batteries (batteries are not included). Both mouse and keyboard have an on/off switch, turn them off when not use. save battery life and reduce battery replacement. 3.[ Mute Wireless Mouse ]- This Cordless mouse provides whisper-quiet clicking, never worry about disturbing others to rest while working or playing. DPI adjustable mouse delivers 3-level of DPI (800/1200/1600) to cater for your different needs in sensitivity. 2.[ Full Size Wireless Keyboard ]- **Note: the 12 Multimedia shortcuts are not compatible with Mac system.** Standard US layout (QWERTY) with number pad, each key is independently and appropriately spaced to prevent hitting the wrong key simultaneously. 12 multimedia hotkeys combined help you to play music and movie, browse the web, open email and more, extremely convenient and efficient. 1.[ Wireless Keyboard and Mouse Combo ]- The 2.4GHz Transmission Technology can provide anti-interference stable transmission and make sure you to enjoy the wireless freedom, just plug and play, no driver or software required. The 2.4GHz technology ensures a strong and reliable connection within 10-meter working range.The USB receiver is plugged into the battery compartment of the mouse. Connect a keyboard and mouse with just a nano receiver.