Descriptions: 30A load programmable weekly digital timer switch relay control time 7 days 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 7 days programmable control of street lamps, neon lights, signs, lamps, water heaters, 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 / 24h, 25 ° C Package Contents: 5 x Timer Switch 5 x User Manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.