Get the most out of your Cruiser TTL 500 Monolight with this shoe-mounted Impact Cruiser Wireless Controller for Nikon cameras. This wireless 2.4 GHz transmitter enables remote control and i-TTL communication from the camera to the light, including support for high-speed, 1st & 2nd curtain sync. It features an impressive range of 328' and has access to eight channels to limit interference. Also, the controller can set up three groups for added control and can remotely access flash output in 1/10-stop increments, turn on/off the sound alert, and set the modeling light power. These settings are easily seen and set via a backlit LCD and a micro-USB port is available for future firmware updates. For power, it accepts two easily-found AAA batteries and the shoe mount is locking for added security.