Outdoor 24-Hour Timer with Light Sensor, Waterproof Infinite Repeat Cycle Countdown Timer(1 Second -999 Hours) for Home and Garden, Black

Works great. It was easy to program and confirm settings. Seems durable and high quality. It's been reliably switching off/on a grow light that is connected to another separate standard weekly timer. I have this Techbee repeat interval cycle timer set to remain on all day and quickly switch off/on for just two seconds shortly after my existing weekly timer switches on a plant grow light each day. That grow light has three different color modes designed to affect growth. My plant light modes can only be changed by depressing a foot switch on/off/on/off/on/off in sequence. I'm using this cycle timer to simulate a manual off/on toggle foot switch that switches through the plant light's three color modes. I now have my plant light automatically switch on, and once on, this repeat timer will automatically switch it off/on for two seconds so it advances to the next light mode in the off/on toggle sequence. With a short off/on 2 second setting, I can now manage my plant light automatically. It's very flexible and has precise programmable timing. I also like that it's water resistant as it sits right below my plant.

This timer is amazing with endless applications. Seller is great at answering questions. Extremely happy with my purchases was looking for ages for something with this functionality.

Works super good. I bought two of these and keep one as a backup. It controls my heat trace on an underground line going to the well at my lake house. Even though the heat trace is self regulating, it can turn on unnecessarily so I use this to ensure the water isn’t too warm. I have it set for 10 min on, 10 min off. Thats a 50% duty cycle.

I love this timer. I have it set up so it turns on a small water pump connected to a very limited capacity water well for one minute out of every hour. It has been really reliable.

Overall, this is a useful little gadget- in my use case, I’m using it to cycle a small water pump for my hydroponics. You can set any increment of time (1 second to 999 hours) On and off (can be different lengths of time). For the price point, quality is as expected and it’s stood up to some harsh conditions over the years, I can’t tell the one I bought last month apart from the one I bought 2 years ago. The only con with these units is that randomly, if the unit loses power (say, if you have it on a switch controlled circuit), it will sometimes reset and loose its programming when the power is restored, but it generally has good power-loss-memory.