Dräger PSS Merlin Telemetry Entry Control Board - Fire Rescue P/N 33 51617 Model PSS Merlin Telemetry Entry Control Board Used, Working Pull from Staffordshire Fire & Rescue Service Tested Working, Following tests done: Powers on, Batteries charging, Set date/time, Test function (all lights blink and every button produces a sharp beep), Keypad fully working, Display panels working. Only the unit, with installed batteries included as shown in images. For further testing and/or live demos, please contact us! ---