This is a remote release for SONY α cameras. Used three times after purchase. I am selling it because I have too much gear and no longer take it out. There are scratches on the surface, but there are no problems with its use. Compatible models: α9 / α7R III / α7 III / α6400 Maximum external dimensions (approx.): 116.5mm (H) x 33mm (W) x 15.1mm (D) Weight (approx.): 35g Material: Plastic Color: Black Operating temperature: -10°C - +50°C Storage temperature: -20°C - +60°C Wireless / Wired: Wireless Transmission method (EX. Infrared): Bluetooth Standard Ver. 4.2 (2.4GHz band) Supported standards: Bluetooth Standard Ver. 4.2 (2.4GHz band) Battery type: Lithium coin battery (CR2032) Frequency range: 2400MHz - 2483.5MHz Photo (shutter): Yes Record start / stop: Yes Focus: Yes Autofocus ON / OFF: Yes Zoom: Yes *2 Display: LED Other functions: C1 button / LOCK switch - Uses Bluetooth wireless technology. Remote operation is possible even in sunlight or when there are obstacles between the camera and the photographer. - Fast and reliable response to button operations. - Feedback function that allows you to check the shooting status with LED lights. - Designed to be dustproof, drip-proof, and resistant to high and low temperatures, regardless of the shooting environment. There is no need to connect cables or receivers, so there is no need to open the terminal cover of the camera body, and the dustproof and drip-proof performance of the system is maintained. - Communicates with the camera's Bluetooth module. Realizes a compact system without an external receiver. The commander body is designed to be thin using a lithium coin battery.