The MZ 52822D is a digital slave flash, with this slave model the flash power can be boosted without any undesirable side-effects. For the very first time the flash shot taken can be directly influenced with the instant correction keys (+/-). The power is generated by normal alkaline size-AAA batteries or the equally inexpensive rechargeable AAA batteries. The 28 CS-2 is a state-of-the-art, compact slave unit comprising Metz’s exclusive ''easy mode'' technology, which allows the user to automatically fine-tune the flashgun to the specific camera’s requirements. The unit is designed for use with cameras that do not feature an integral hot shoe and has a built-in bracket that allows the unit to be attached to the side of the camera.