ecomwize 2.4G Ultra Slim Portable Wireless Keyboard and Mouse Combo for Desktop, Windows 7 / 8 / XP / Vista - White 78 keys with Scissor feet keycap Low-profile, whisper-quiet keys ensure comfortable and smooth typing. Hot keys customized for Windows keep access to applications and media control in easy reach Working distance is up to 10 meters. Perfect combo set for you: Wireless QWERTY Keyboard , Wireless Mini Optical Mouse, Tiny USB Receiver.OS: Windows Me/2000/XP/Vista/7 Android TV BOX & Tablet PC. NOTE: The Nano-receiver can be found in the battery compartment of the keyboard/mouse.* Requires 4 AAA batteries (2 for each unit) , batteries NOT included. Reliable 2.4 GHz wireless connection: A tiny nano-receiver connects both the keyboard and mouse using just one USB port