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. Specifications: Model: TM919B Power supply: AC220V Switch contact: 1 change-over switch Program: 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 Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.