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 / 24h, 25 ° C Package Contents: 3 x Timer Switch 3 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.