Descriptions: 30a Load Programmable Weekly Digital Timer Switch Relay Control Time Automatic Switch Machine Installed On Din Rail. Tm919b (30amp Load) Din Rail 7-day 24-hour Programmable Switch Timer Can Automatically Turn On And Off Various Electrical Equipment At Preset Time. It Is Widely Used For Programmable Control Of Street Lamps, Neon Lights, Signs, Lamps, , Air Conditioners, Billboards, Rice Cookers, Supercharger, Sprayers, Bottling Machines, Preheaters, Agricultural Facilities And Broadcasting Equipment. The Digital Timer Switch Is Built Into A 1.2v/40ma Rechargeable Battery To Store The Power Failure Program. It Has The Characteristics Of Low Power Consumption, High Precision Cmos Chip, Strong Anti-interference, Simple Setting And So On. Specifications: Model: Tm919b Power Supply: Ac220v Switch Contact: 1 Change-over Switch Procedure: On / Off 16 Times A Day Or A Week Minimum Interval: 1 Minute Timing Range: 1min ~ 168hr Color: White Material: Abs + Electronic Components Average Error: 1s / 24