One-to-many connection: One tiny receiver for up to six Unifying devices.
Plug it and leave it, then connect additional mice and keyboards to one computer.
Download Unifying software to quickly add all of your devices to one receiver.
It's convenient, clutter free, advance 2.4 GHz wireless technology.
For easy mobility and exceptional experience, keep a mouse-and-keyboard at work, at home and in your computer bag. They are always ready to use from only one USB port.

Compatible with the following models:

Anywhere Mouse MX (M905)
Performance Mouse MX (M950)
Wireless Mouse M505, M510, M525, M305, M310, M315, M325, M345, M705, M215, M185
Couch Mouse M515
Touch Mouse M600
Marathon Mouse M705
Logitech keyboard K230, K250, K270, K320, K340, K350
Logitech Wireless Solar Keyboard K750, K800
Logitech Wireless Desktop MK710, MK605
Logitech Wireless Wave Combo MK550
Wireless Combo MK520
Logitech Number Pad N305
Logitech Wireless Trackball M570
MK330, MK270 etc.

Before using this receiver, please download and install Unifying software: http://support.logitech.com/en_us/software/unifying

Specification:

Type Receiver for Logitech Unifying
Material ABS, metal
Quantity 1pcs
Item Color As shown
Size 1.4*1.8*0.6cm / 0.5*0.7*0.2 " (L*W*H)
Net Weight 2g / 0.07oz

Package include:

1 x Nano Receiver Dongle 6 Channel for Wireless Keyboard Mouse 2.4 GHz