Can be installed on a guitar with a sound hole using just one screwdriver. I was using this until recently. There are faint scratches from pick contact, but they are barely noticeable unless held up to the light. Wireless pickup WL-800JP, a high-performance model that transmits audio signals wirelessly. - Model Name: WL-800JP - Brand: SKYSONIC - Included Items: Receiver, Instruction Manual - Type: Wireless Pickup - Connection Type: Wireless - Function: Wireless transmission of audio signals Thank you for viewing. Please note that we cannot accept returns to prevent product switching. Also, the buyer takes precedence even during negotiations.