The Dot Line RS-RT03R4C 4 Channel Wireless Receiver helps you eliminate that tangle of PC cords and achieve off-camera functionality and studio lighting effects with your flash. The receiver has a PC outlet, as well as a 1/4" (6.3 mm) mono plug which is common to many studio flash units. A mini plug (0.13' / 3.5 mm) adapter is provided for units with a matching outlet. Standby mode ensures maximum battery life. The receiver is rated for 30,000 hours on 2 AAA batteries (not included). This listing is for the receiver only which is designed for use with 4 channel RS-RT03 series transmitters.