The Modus 600RT MK II Speedlight for Micro Four Thirds Cameras from hahnel is a feature-laden speedlight with TTL, manual, HSS, and stroboscopic flash modes. This versatile speedlight is suitable for single on-camera flash photography and also complex multi-light setups. Featuring a rechargeable lithium-ion battery pack, the Modus 600RT MK II provides up to 600 full-power flashes with a faster recycle time than conventional batteries. With built-in 2.4 GHz wireless connectivity, setting up a remote flash or group of flashes is simple without having to string synch cords or rely on bulky exterior remotes. Additionally, the intelligent optical slave system allows wireless master and slave communication between multiple Modus speedlights. The tilting and pivoting head puts the strobe output wherever it is needed, and the quick-lock shoe securely connects to the camera in just seconds.