Features: brand new and high quality It can connect 6 different devices that support -UniLink at the same for time, and can connect any keyboard and mouse that supports -UniLink technology. (Note that both keyboard and mouse can be used) The mouse models that can be paired are: M950/M905/M705/M545/M525/M515/M510/M505/M345/M310/M305 (Union version)/M215 (Union version)/M185.....and other support Products of Union Technology The keyboard models that can be paired are: K800/K750/K520/K350/K340/K320/N305/K270/K230.....and other products that support ULink- technology Our portable designed Union receivers help laptop users connect all compatible wireless mice; keyboards or other compatible computer peripherals to their computer in an easy, convenient and organized way. Special attention: M215, M305, MK270 also have non-universal versions, which cannot be equipped with this receiver! (Please contact customer service if you are not sure) Package Includes: 1 PC x Receiver Specifications: Item: for MK365 6 Channel Receiver Connection With Computer: Wiring Wireless Transmission Frequency: 2.4Ghz Material: ABS+Metal Size: Mixed for: suitable for Unifying Mouse Keyboard./ for Mouse/Keyboard with the (UNI-Link) sign on the bottom cover can be paired note: Due to the difference between different monitors, the picture may not reflect the actual color of the item,please make sure you do not mind before ordering, Thank you! Please allow 0-1cm error due to the manual measurment.