Features: The transmitter can control the receiver wirelessly to perform autofocus, single shot, delayed release of 3s, continuous release and long exposure (BULB); The receiver can also be used as a wired shutter remote to do auto-focus, single shot, continuous release(bulb). Shutter button on Transmitter and Receiver: Half press to auto-focus, fully press to take photo. Specification: System mode: 2.4GHz wireless control system Transmission distance: over 80m) Transmitter Dimension: L 67mm X W 36mm X H13mm Receiver Dimension: L 90mm X W 41mm X H32mm Weight: Transmitter 13g; receiver 37gexcluding batteries Box Contains: 1 X wireless shutter remote release control transmitter 1 X wireless shutter remote release control receiver 1 X CR 2032 Battery for transmitter 2 X Connecting cord 2 X Lanyard sling Please note: AAA batteries are not included.