BUILT-IN LED LIGHT CAN BE USED TO ILLUMINATE NEARBY SUBJECTS IN DIM LIGHT, VERSATILE VERTICAL & HORIZONTAL BOUNCE CAPABILITY PROVIDES AN EXTENDED RANGE OF POSSIBLE LIGHTING EFFECTS, FLASH RELEASE FUNCTION TRIGGERS THE CAMERA WIRELESSLY FROM THE FLASH ON A 2-SEC DELAY, ALLOWING THE FLASH TO BE REPOSITIONED TO ILLUMINATE THE SUBJECT, WIRELESS SLAVE FUNCTION SUPPORTS 3 GROUPS & 4 CHANNELS, ALLOWING THE FLASH TO BE POSITIONED OFF-CAMERA, FLASH COVERAGE CAN BE SWITCHED BY EXTENDING OR RETRACTING FLASH HEAD, LIGHT & COMPACT BODY, USEFUL FOR SHOOTING VIDEO AS A MODELING LIGHT OR AS AN AF ASSIST BEAM (WITH LIVE VIEW), PROVIDES UP TO 4 HOURS OF CONTINUOUS LIGHTING WITH FULLY CHARGED AA BATTERIES;REQUIRES 4 AA BATTERIESUPC : 013803136678Shipping Dimensions : 6, 30in X 4, 60in X 3, 60inEstimated Shipping Weight : 1, 1 SKU: PECND5246B002