It has some scratches and scuffs from use and age. Power button on the main unit: OK Volume: Channel B. The sound is only available in one position Audio Input: OK (confirmed by RCA) Speaker Output: OK Meter Response: OK Meter Lighting: OK Headphone output: OK. Please inform me if there is an item which you are looking for. I will try to look for it as much as possible.International Buyers - Please Note. The item "For Parts Yamaha A100 2-Channels Professional Power Amplifier" is in sale since Wednesday, December 9, 2020. This item is in the category "Consumer Electronics\TV, Video & Home Audio\Home Audio\Receivers & Amplifiers\Amplifiers & Preamps". The seller is "totsuch_0" and is located in Nagoya. This item can be shipped worldwide.