Technical Date Model:AD400Pro Flash Mode:Flash Mode:Slave unit of radio transmission :M/Multi:TTL/M/Multi Guide No (m IS0 100):72(m ISO 100, with high-efficiency standard reflector) Flash Duration:1/240 to 1/12820 seconds POWER:400Ws Power Output:9 steps:1/256~1/1 Stroboscopic Flash:Provided(up to 100 times, 100HZ) Flash Exposure Compensation(FEC):Manual. Feb: +3 stops in 1/3 stop increments Sync Mode:high-speed sync(up to 1/8000 seconds), first-curtain sync and second-curtain sync Delay Flash:0.01-30 Seconds Mask:√ Fan:√ Beeper:√ <br>Modeling Lamp(LED）：30W/4800K/TLIC:93 Optical Slave Flash：S1/S2 Flash Duration Indication：√ Display：dot-matrix panel Wireless Flash(2.4G wireless transmission): Wireless Flash Function：Slave, Off Controllable Slave Groups：5(A, B, C, D, E) Transmission Range (approx)：100m Channels：32(1~32) Wireless ID：To avoid signal interference effectively, triggering can only be achieved when the channels and wireless IDS of the master and slave unit are set to the same Power Supply Power Supply:Lithium battery pack(21.6V/2600mAh) Full Power Flashes:390 Recycle Time:Approx 0.01-0.9s Battery Indicator：√ Power Indication：Power off automatically after approx 30-120 minutes of idle operation Sync Triggering Mode：3.5mm sync line Color Temperature：5600±200K Stable Color Temperature Mode：Changes within +75K in entire power range Dimension Dimension (with battery）：220x102x128 mm(flash tube& reflector not included) Net Weight(with battery)：2.1 Kg(flash tube reflector not included)