SONY RMT-831 Since I don't have the main unit, I haven't confirmed its operation. While it doesn't appear to have been used much, there's a melted-looking mark on the back. (Please check the photos) If you're okay with this, please consider purchasing it with no claims and no returns. The battery appears to be CR2025 (Not included) ↓↓↓ The following is an AI explanation for your reference SONY remote control RMT-831, with various functions. - Brand: SONY - Model: RMT-831 - Functions: START/STOP, PHOTO, INDEX, MEMORY, SEARCH, PLAY, REW, FF, PAUSE, STOP, SLOW, DISPLAY, ZERO SET MEMORY - Country of Manufacture: MADE IN CHINA Thank you for viewing.