Used as a timer shutter release for sony cameras/camcorders. Note: how to use B door? Turn the camera to M position, turn the dial, and adjust the shutter speed to BULB (which is what we often call B door, the dial can be seen by turning counterclockwise). RM-VS1 Remote Control Shutter Release Timer Cord for SONY A7 A7R RX10... -Video Pause (Start /Stop) Button -Power switch Button Mcoplus RM-VPR1 Camera Remote Control Shutter for Sony 4-in-1 multitool: table saw, belt sander, dual grinding wheel, and polishing wheel. · Powered by a robust 3/4 HP motor with 6000 RPM speed for efficient output The back of the controller with a 1/4 screwed hole and come with a self-adhesive brand, so it's perfect for tripod, night or bulb shooting. (Recommended this method, hands are not tired) 3. The aperture value should be as small as possible to get a more reasonable exposure time! Sony Shutter Remote JJC RM-VPR1 Wired Remote Commander With Multi Terminal Cable, Remote Control For Sony RX0M2 RX100VII RX10IV Z-V1 A7RM4A A7RM4 A7RM3A A7R A7SM3 A7S Aodelan Camera Remote Control The shutter operation on the body, press the shutter button, how long it can be pressed, the hand is released, the exposure is completed. Video pause function:pause quickly when video, convenient to switch between photo and video modes The cable length is 1 meters. -Fixed to tripod by 1/4' screw hole. -Shutter release Button(half-press focus) -B bulb lock -Zoom button(half-press for slow zoom, full-press for zoom) Access to the RM-VPR1 control B door operation: 1. Press the camera button on the RM-VPR1 remote control, release it after reaching the expected exposure time, and the exposure is completed; 2. Press the camera button on the RM-VPR1 remote control, then slide down and lock the camera button. Mcoplus RM-VPR1 39.4 Inches Remote Control Shutter Release Cord with Multi Terminal Cable as RM-VPR1 Replacement for Sony RX10/HX50/HX60 A7 A7III A7R A6000 A6400 A5100 A7S A5000 NEX-3N This remote multi-terminal cable is special designed for Sony A7M2 A5100 A7S A5000 A-6000 A7R A7 NEX-3N, it's also can be replacement of RM-VPR1 multi-terminal cable. -Tied to the wrist by magic strap. Compatibility: Digital cameras: DSC-QX30,ILCE-QX1,DSC-RX100M3,DSC-RX100M2,DSC-HX50,DSC-HX300,DSC-RX10,DSC-HX400,DSC-HX60 Digital camcorders: HDR-CX220E,HDR-PJ220E,HDR-CX290E,HDR-CX390E,HDR-PJ390E,HDR-CX510E,HDR-PJ660E,HDR-PJ350E,HDR-PJ240,HDR-CX900E,HDR-CX610E,HDR-CX240E. Advanced wired remote commander with zoom and shutter lock functions for both still image and movie.