Pre-sale phase now，Please extend the ship time by 30 days. Model: AD400 Pro Bowens Mount Wireless Slave Unit Mode: *Rdio transmission mode (compatible with Nikon & Canon,Sony,Olympus,Panasonic,Fujifilm ) Flash Mode: Wireless off:Slave unit of radio transmission/M/Multi:TTL/ M/Multi Guide No. (m ISO 100): 72 (m ISO 100, with high-efficiency standard reflector) Flash Duration: 1/220 to 1/10100 seconds POWER: 400W 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. .