KIDDE intelligent radio zone monitor 240vac smartcell wzm, radio communication with devices., bidirectional communication at 868 mhz., 80-character display., voltage 220 to 240 vac, 50 hz, 0.3 a. consumption: 5 ma (psu), plus 100 ma from wzm., dimensions: 275 x 220 x 80 mm. weight: 1.55 kg.