Model PP26, a case manufactured from resistant ABS of 2.5 mm thick. This enclosure with bevelled corners, comprising a body, cover and inspection hole for transparent display, is of ideal size to house a manual use device which requires an attached membrane keypad. It has a compartment for 2 AA or 1 9V batteries. Each unit includes seal screws and screws to secure the circuit and battery terminals. It is available in black and grey (RAL7035).