Digital time switch with an astronomical program SHT-4Timer with an astronomical program to control the lighting without using a light sensor.DESCRIPTION Two-channel design, where each channel is programmable independently of the other. By entering the geographic coordinates, the lighting can be switched on/off by sunrise and sunset. During programming, 120 minutes may be added to the time of sunrise and sunset. Selection of ON/OFF functions at sunrise or sunset. Automatic switching between winter and summer time. TECHNICAL PARAMETERS Power voltage AC 230 V. Battery life - up to 3 years. Output contact: 2x changeover 16 A (AgSnO2). 2-MODULE, DIN rail mounting.