With a guide number of 213, the Professional Studio Monolight from Neewer is a 5600K daylight-balanced flash source that offers solid core and convenience features at a budget-friendly price point. The head features a 0.4 to 2.8 second recycling time with flash durations as short as 1/2000 second. Power is variable from 1/8 to 1/1 while recycling is a fast 0.4 to 2.8 seconds with flash durations as short as 1/2000 second. The unit has a 150W modeling lamp. Flash triggering can be done manually, via an optical sensor, or remotely by radio with a separately purchased transmitter. Ready for worldwide use, the head runs on 100 to 120 VAC mains power.