LOGICOOL PEBBLE M550 in white, featuring a silent design and both Bluetooth and USB connectivity. I've used it for about two years. I'm selling it because the click response feels a little weak. However, it's still usable, I guess. - Model Name: LOGICOOL PEBBLE M550 - Color: White - Connectivity: Bluetooth and USB receiver - Included: Instruction manual, USB receiver - Features: Silent design Thank you for looking.