Verifies malfunctions of remote indicator id-1917/apn-209 and receiver-transmitter rt-1115/apn-209; operating power requirements; 28 vdc, 2 amrs; 7.00 in lg by 7.00 in w by 4.00 in deep, 6.0 pounds; special features; used as test harness and/or control box; designed for portable use