Compact action camera accessory with volume control and call functions. - Button layout: Includes volume adjustment, play/pause, and call buttons - Design: Square-shaped, compact design - Material: Plastic body - Accessories: Includes a clip https://amzn.asia/d/0cumXQW9 The battery cover is damaged, but it can be used without any problems. You can connect it to your smartphone via Bluetooth to skip tracks, change chapters, and answer calls. No returns accepted. Price negotiations are possible. Thank you for looking.