Choice of two versions (with or without battery door and compartment) ? in two sizes ? in two colours. Over molded in general purpose ABS plastic with a soft grey plastic grip. Top cover is recessed for membrane display or keypad. PC board standoffs are molded into case. Includes removable front panel (for easy modifications) and assembly hardware. Battery door and compartment version includes four battery clips (for two – AA batteries) and a 9 volt (PP3) battery clip.