The new eVOLV200 Pro TTL is not just a mighty 200 watt second, fully cordless TTL strobe, with built-in R2 2.4GHz wireless, but a leap forward on the original eVOLV200 "Pocket Flash" with interchangeable flash heads. This is the "Pro" version, with Stable Color Mode, ID Settings for Channel security, 1/10th stop precision, and advanced internal enhancements for the best portable flash experience you can imagine. The eVOLV200 Pro TTL is triggered by R2 Series on-camera and in studio flashes, in TTL/M/Multi mode, forcorrect flash exposure even in complex light-changing environments. This proven performer is compatible with and automatically senses Canon, Nikon, Sony, Fujifilm, Pentax, Panasonic, and Olympus systems for remote power control and shooting. You can instantly snap in your personal shooting-style preference flash head, such as the traditional speedlite style Fresnel Head, the exciting Round Head with superior clean light spread, or choose to use to the Barebulb Head with an efficient parabolic reflector. The incredible amount of power and control in these compact and lightweight flashes, make this design the first choice ofprofessional photographers with an eye for flexible multiple light setup. The eVOLV200 Pro TTL has a max recycle time of under 2 seconds and enough energy to cover at least 500 full power shots. That gives more flexibility and instant solutions for multiple off-camera lighting while maintaining all of the investment in l