The Photogenic Ion Lithium-ion Pure Sine Wave Inverter Module without Battery is the heart of the ION Inverter System which allows you to take your studio strobes on the road or off the road without electricity and without noisy generators or bulky old-style inverters. Weighing in at only 3.5 lb including its optional battery, the Ion measures only 7.5 x 4.4 x 3.3" but is able to deliver hundreds or even thousands of full power flashes depending on the flash head in use. For example, Photogenics 1,000W/s PL1000DR gets 300 full power flashes on a fully charged battery while their AKC160 will get a whopping 2,050 flashes from the same battery.