The Pentax CS-310 Cable Switch is designed for use with the Pentax K-70 digital SLR camera. Cable length is approx 1 metre. Ideal for photographing macro subjects, or using long exposure or the bulb mode of the camera as it avoids any movement of the camera when you press the shutter release. Press the remote switch shutter button lightly and the cameras exposure meter and autofocus system are activated. Press the shutter release all the way down to take the shot. For extended exposures in Bulb mode, you can keep the shutter open by sliding the shutter release button to the Hold position whilst pressed down.