30A load programmable weekly digital timer switch relay control time 7 automatic switch machine installed on DIN rail. TM919B (30Amp load) DIN rail 7-day 24-hour programmable switch timer can automatically turn various electrical equipment on and off at preset times. It is widely used for programmable control of street lights, signs, air conditioners, billboards, rice cookers, sprayers, bottling machines, preheaters, agricultural facilities, and broadcasting equipment. The digital timer switch is built into a 1.2V/40mA rechargeable battery to maintain settings during power failure. It features low power consumption, high precision CMOS chip, strong anti-interference capability, and simple setting operation. Specifications: Model: TM919B Power supply: AC220V Switch contact: 1 change-over switch Programs: On/Off up to 16 times per day or per week Minimum interval: 1 minute Timing range: 1 minute to 168 hours Color: White Material: ABS + electronic components Average error: 1 second per 24 hours at 25°C Package Contents: 1 x Timer Switch 1 x Manual Note: Light and display differences may cause slight variations in color between the image and actual item. Measurement allows an error of +/- 1-3 cm.