1. Easy to use, just plug and use. 2. Shutter release button with lock for long exposures shooting and continuous shooting. 3. Halfway pressed button for auto-focus and exposure metering. 4. Use this shutter release to avoid camera vibration and get sharper pictures. 5. It helps preventing vibration during long exposures (time-lapse photography), close-up (macro photography) or continuous shooting. 6. Compatible with Sony A900 / A700 / A350 cameras.
