Feature: 1. Auto-timer, can set delay time, exposure time, interval time and number of shots. 2. Support manual shutter release, even if start the timer, you can shoot manually. 3. The precise timing can set the time in units of 1 second, from 1 second to 99 hours 59 minutes 59 seconds. 4. Support manual exposure, BULB, interval timer, auto continuous focus, single continuous shooting (shutter priority). 5. Can move the shutter. Suitable for slow door photography, small depth of field photography, difficult angle photography, reducing vibration. 6. Adopt high-quality flexible wire core as guide line, high elastic metal contact sheet as switch, durable without deformation, precision metal plug, closely connected shutter line interface. 7. Lightweight, good stability, standard line is about 90cm length. 8. Support for focus, shutter release and BULB shooting lock, timing photography. 9. Portable, recommended for night scene, product, advertising, stage shooting, commercial photography, etc. Specification: Item type: Shutter Remote ControlCondition: 100% brand newMaterial: ABSWeight: Approx. 159gColor: blackLine length: Approx. 90cm/35.4inTimer delay: 0s to 99hrs 59min 59s in 1s increments Exposure time: 0s to 99hrs 59min 59s in 1s increments Interval time: 1s to 99hrs 59min 59s in 1s increments Shots quantity: 1 to 399, ------ (not limited) Battery: 2 x AAA batteries (not included)Work temperature: -20~ + 50 ° CApplicable models: RM-S1AM: for Sony a900 / a850 / a800 / a700 / a580 / a560 / a550 / a500/ a450 / a400 / a350/ a300 / a200 / a100 / a99/ a77 / a65 / a57 / a55 / a35 / a33 / a77M2 / a99M2 It adopts universal function keys, which have functions such as timing control of shutter and exposure time. It is suitable for interval timer shooting and astronomy shooting, and it is very accurate.. Package List: 1 x Shutter Release Remote Control 1 x Instruction