ProMaster 200SL Speedlight for Nikon

The Promaster 200SL Speedlight for Nikon features:
Guide Number: (ISO 100) 60m/200′ at 180mm reflector position
Flash Coverage: 24 – 180mm (18mm with wide panel)
Auto/Manual zoom
Built-in wide panel (18mm) and bounce reflector
Flash Duration: 1/800 – 1/20,000 second
Color Temperature: 5600K
Exposure Compensation: +/-6 EV in 1/3 EV increments
Master/Slave Mode: Optical pulse with 3 groups, 4 channels
Recycling Time: Alkaline cells 0.27-5.25; NiMh cells 0.15-3 seconds

Power Source:
4x 1.5V AA alkaline batteries, 4x 1.2V NiMh batteries, optional HV external power supply