Parkinson Cowan 500GLX/2 is your modern, feature-rich, and reliable solution to exposure time measurement and control. The equipment is an industry standard, widely used in photo studios, laboratories, and factories. It can be used in both manual and automatic modes. There are two display modes: normal and reciprocal. It has a built-in memory that can store up to 4 exposure programs. Additional features include a built-in audible signal, selectable in steps of 0.1 or 1 second, and a socket for remote control.