Infrared Multi Channel Remote Control consists of Transmitter and camera-mounted Receiver. It has a choice of three infrared channels for interference free operation. The auto focus cannot be controlled with this remote control. Up to 30 ft. operating range. The transmitter uses two AA Alkaline batteries, while the receiver one 9 Volt battery (not supplied).PRODUCT FEATURES:Weight: Transmitter: 4.6 oz., 130 g. (without batteries);Weight: Receiver: 4.9 oz., 140 g. (without batteries).