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. Push button controls allow the desired power levels and functions to be quickly set. EXd200 also has user changeable flashtubes. The EXD can also overcome the problem caused by cameras that tend out a pre flash before exposure, a simple press of the buttons tells the EXD to ignore up to 3 pre flashes. Accurate power adjustment in one tenth of an f-stop increments over a 4 stop range and a high guide number of 45m (135ft) ensure the exact amount of light required. 100% recharge is confirmed by both audible and visual means in less than 2 seconds. A built in infrared slave cell allows freedom in the studio when used with the Interfit IRX transmitter (int411)