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