Reliable 2.4 GHz wireless connection: A tiny nano-receiver connects both the keyboard and mouse using just one USB port;Pencil-thin,Low-profile, whisper-quiet keys ensure comfortable and smooth typing. Hot keys keep access to applications and media control easily;DPI button easily adjusts the sensitivity of the mouse between 3 DPI levels (800/1000/1200).The Nano-receiver can be found in the battery compartment of the keyboard/mouse.Requires 4 AAA batteries (2pcs for mouse, 2pcs for keyboard) , batteries NOT Included.Only support the English Layout.Color: goldMaterial: ABS plasticKeyboard size: 280x130x20mmKeyboard weight: 300gMouse size: 113x57x23mmKey: 78 keysBattery type: Using AAA battery(not included)Interface: USB 2.0Operating range: 10 metersHow to use: 1. Open the package box, then take out the keyboard and mouse.2. There is a battery compartment in the bottom of the keyboard, then open the battery cover, you will see a USB receiver inside, take out it and insert the device you want to connect.3. After take out the usb receiver, then put 2pcs AAA batteries inside the compartment with correct setting.4. For mouse is same with the keyboard, there also a battery compartment on the back of the mouse, open the cover and put 2pcs AAA battery too with correct setting.5. With USB receiver connect succeed, you can enjoy the keyboard and mouse now Note: 1. It works via a USB receiver connecting, so the device you use should have a USB port, or it can not works.2. This keyboard can normal compatible with tablets, but tablet without USB interface, so you can't insert,You need to buy one "OTG" tieline.Package Included: 1 * Wireless Keyboard1 * 2.4G Receiver1 * mouseOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in e picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.