The JJC MA-PK1 Camera Remote Shutter Cord is an indispensable accessory for photographing from a tripod when, for example, taking macro or long-shutter shots. As you do not need to press the shutter of your camera, your camera remains completely stationary. Because of the lock function, you can also use the remote control for slow shutter speed recordings in BULB mode (longer than 30 seconds). The JJC MA-PK replaces the Pentax CS-310.