The SO-1 Hama Wireless Remote Control Release can be used to trigger the shutter on your Sony Alpha camera without disturbing it, this will avoid any camera shake & ensure your images are pin sharp. The remote control cable release is ideal for taking pictures of subjects that are difficult to approach, or to minimise vibration for close-ups & time exposure. Generally used in conjunction with a tripod the SO-1 Hama Wireless Remote Control Release is ideal for taking pictures of subjects that are difficult to approach, or to minimise vibration for close-ups & time exposure.- Wireless remote control release (4channel 433 MHz) for Sony DSLR cameras with RS-S1AM E3 connection- With serial release & time exposure (bulb)- Range: up to 30 metres (also through the wall)- Very easy installation of the receiver via the ' Remote' input- Two-stage release key (autofocus, release); for the time exposure the release has to be pressed for 3 seconds Compatible with the following camera models: Sony Alpha DSLR 700, 350, 300, 200, 100,