The Dot Line RS-RT05K4CS Deluxe Digital Wireless Flash Trigger Kit for Sony is an ideal way to eliminate a tangle of PC cords and achieve off-camera functionality and studio effects with your flash. The low profile transmitter slips quickly onto your Sony "A" series camera's hot shoe and triggers a flash up to 100' away connected to the receiver. 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 that maximum battery life. The transmitter is rated for 20,000 exposures on a single 12V battery (included) and the receiver is rated for 30,000 hours on 2 AAA batteries (not included).