Features: brand new and high quality This product is only suitable for logitech-Unifying Mouse Keyboard. Mouse: for Logitech-M950 M905 M705 M545 M525 M515 M510 M505 M345 M310 M185 M305(Unifying version)M215(Unifying version) For Logitech-K800 K750 K520 K350 K340 K320 K305 K230. Keyboard and mouse set: for Logitech-MK710 MK520 MK330 MK270(Unifying version) MK220(Unifying version). Wireless 2.4G technology is adopted, transmission signal is stable, and the transmission distance is 10m or 393inch. This wireless receiver supports up to 6 devices connected at the same for time. Plug it and leave it, then connect additional mice and keyboards to one computer. Features miniature size and lightweight, which is convenient to carry out and store. Specifications: Type: Wireless Receiver Material: ABS, Metal Item Color: Black Interface: USB Wireless: 2.4G Distance: 10m or 393inch Size: approx 1.4x 1.8x 0.6cm or 0.5x 0.7x0.2inch Note: Please contact customer service before placing an order to confirm whether your model is applicable before placing an order. If you want to know if yours supports it, just check if your mouse is an Unifying product. Package includes: 1 x Wireless Receiver Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.