Utilizes a high-quality flexible wire core as the control line and an elastic metal contact sheet as the switch, ensuring durability without deformation and a precise metal contact for a closely connected shutter line interface. Features a soft wire and thick, durable contacts. The switch has good elasticity and recovers quickly, providing a great hand feel. Gently press halfway down on the camera's shutter button to activate the camera's autofocus/metering system; press halfway down to focus accurately. When the camera is set to BULB shooting mode, you can fully press the shutter button and push it forward to lock the camera's shutter for long exposures. Supports focus, shutter release, and BULB shooting. Offers three shooting methods: single shooting, continuous shooting, and video shooting. Minimizes vibrations during filming. Allows you to photograph inaccessible objects. The shutter release line is 90 cm long, lightweight, offers good stability, and is easy to carry. Recommended for night/product/advertising/stage photography, commercial photography, etc.