Silent Bluetooth mouse, 90% silent design for comfortable operation. - Brand: logicool - Model: M240 - Features: Bluetooth connection - Silent function: 90% silent - Accessories: Box, instruction manual, warranty - Color: Black Thank you for viewing. I purchased this for work, but I'm selling it because I found out the PC I intended to use it with doesn't support Bluetooth. I used it for about 30 minutes, so it's practically new.