PR4 AC module, AC power for Quantum Qflash X series flashes connected to a Qpaq-X power pack.
Substitute a PR4 AC module for either a PB1 or PB2 battery, connect the PR4 module to an AC mains outlet, and have uninterrupted power for all-day studio shooting. You now have a studio quality flash system that is fully dedicated to your digital or film camera.
For location use, just remove the PR4 module and attach either a PB1 or PB2 and your ready to shoot outdoors. In the studio or on location shoot i-TTL, D-TTL, A-TTL, E-TTL II, E-TTL or TTL with the Qflash X2D or TTL with the Qflash X/X2. QFlash recycling times are the same for AC or DC power.
All models of Qflash can be used in the Manual, or TTL modes with a Quantum Softbox (QF68) for portraits. You can quickly interchange accessory reflectors for shooting bare bulb, wide angle, diffused or telephoto photos.