Finder Mechanical/ Digital Daily/ Weekly/ Astro Time Switch, 250VAC, 16A - Finder 12.81.8.230.0000, The Digital Time/Astro-Switch (Finder 12.81.8.230.0000) is rated at 230VAC, 16A. The 1 CO (SPDT) has an Astro program for the calculation of sunrise and sunset times through to date, time and location coordinates. The location coordinates are easily settable for most European countries through their post codes. An offset function allows programming of switching times offset from the astronomical time. The switch has a back-lit display and an internal battery for set-up and programming, without being connected to the mains power supply. The back-up battery is easily replaceable from the front of the unit. This is for mounting on 35mm DIN rail. Finder 12.81.8.230.0000 Digital Time/Astro-Switch 16A 1 CO (SPDT)