The EXD200 is lightweight and stylish yet very robust, and it is designed specifically for 21st century photographers on the move. The 5 volts Sync voltage makes them highly suitable for use with all current digital and film cameras. Touch button controls allow the desired power levels and functions to be quickly set. The EXD can also overcome the problem caused by cameras that send out a pre flash before exposure, a simple press of the touch button controls tells the EXD to ignore any pre flash. Accurate power adjustment in one tenth of an f-stop increments over a 4 f-stop range and a high guide number of 45 (135ft) ensure the exact amount of light required. A built in Infra red slave cell allows freedom in the studio when used with the Interfit IRX transmitter. (INT411)