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.