neewer rt-16 wireless studio flash trigger neewer <p><b>features:</b> <br />this wireless trigger is control discreteness for camera to trigger hot shoe flashgun synchronously. <br />easy installation, low power consumption <br />no any damage to camera. <br />high-speed and synchronous for 1/200 second. <br />max. working distance: 30m (open area, without interference). <br />16 channels to avoid interference. <br />the receiver has an on/off switch, and an led to indicate triggering. <br />new design: channel selector outside the transmitter and the receiver. </p> <p><b>specifications:</b> <br />wireless flash trigger. <br />16 channels selectable. <br />power input of transmitter: 23a 12v battery (included). <br />power input of receiver: 2 aaa batteries. <br />long lifetime of trigger battery, one year or over 20,000 continuously triggers. <br />plug size of receiver: 3.5mm. <br />adapter size for receiver plug: 3.5mm --> 6.35mm. <br />pc sync cable included. <br />radio working frequency: 433mhz. </p> <p><b>how to use:</b> <br />make sure the channel selector of both transmitter and receiver at same position. <br />insert the receiver's trigger output plug into your flash's jack. <br />press the test button on your transmitter. the studio light should now flash. <br />insert the transmitter's hot shoe socket into your camera's hot shoe jack (if your camera does not have a hot shoe use a pc sync cord and insert into the socket). <br />you should now be ready to start shooting (you can use the 3.5mm sync cable for cameras without hotshoe or hotshoe is engaged). </p> <p><b>package contents:</b> <br />1x trigger. <br />1x receiver.</p>