I've been using this mouse for about a year and a half, but I'm selling it because I've switched to a different one. It's a USB-A receiver type that you plug into your PC. I haven't had any connection issues while using it. The appearance is as shown in the photos, and there are no noticeable stains or marks. - Brand: BUFFALO - Model: BSMBW315V - Connection: 2.4GHz Wireless (Not Bluetooth) - Included: USB Receiver - Power: AA Battery - Size: Compact - Manual: Instruction manual included