Legrand PolaRex QKT, analogue defrost timer with quartz motor (accuracy +/- 1 sec/day, power reserve 100 hours), 1 channel, operating voltage 230 V 50/60 Hz. Time switch with day disk and adjustable short-time programs, switching time adjustable from 1 to 60 minutes. The shortest switching sequence (start of a switching time): 30 minutes. Installation on EN 60715 mounting rail or surface-mounted, dimensions (HxW): 113.7 x 72 mm. Switching output: 1 changeover contact.