OJ Electronics ETO2-4550-EU28 is a digital snow-melting and de-icing controller with 3 channels and 5 basic programs as standard. The shortest temperature phase is 16 minutes and the standby consumption is 6 W, with an IP21 enclosure occupying 9.3 modular widths on DIN rail. It is used to control ramp, roof, and gutter heating systems from combined temperature and moisture sensors.