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The Intermatic ST01 has been around for quite a while. I have had a couple of them before but sold that house. prior to the ST01 I had a regular in wall astronomical timer but those had a problem with CFL bulbs that I was using. This timer has a different kind of switch inside powered by the battery that actually turns the devices on or off. This works for LED or CFL bulbs. The last one I just bought was used on ebay, for about half the usual list price which made it a great deal. There are instructions in PDF from Intermatic available and also numerous YouTube videos available. The programming is not real user friendly so need the instructions to be successful. I used mine in a three way switch application and works great.
Verified purchase: Yes | Condition: Pre-owned
I use these switches to control various outdoor lighting. This is the third one of these I have bought. The first two have been in place for over two years and have worked flawlessly. This most recent purchase was to replace another brand that didn't have a replaceable battery. That battery had failed causing the switch to lose memory if the power dropped for more than a second. What I like about the Intermatic ST01 is that the battery is user replaceable. Incidentally, the original batteries in the first two units are still in place and working. Programming of the switch requires some attention to detail but is relatively easy once the battery is installed because the programming can be done before final installation. Installation may be difficult in some shallow boxes just due to the size of the switch. Read full review
Verified purchase: Yes | Condition: New
I started using similiar in wall timers years ago for outside lights. When I switched to cfl bulbs the bulbs flickered. The timers were not compatible. So I went to these timers because they were compatable and the flicker stopped. Cob led bulbs eventually replaced the cfl bulbs. I bought a third timer to replace the old electro mechanical timer in the garage. Once the programs are set I just need to replace the batteries every year or so.
Verified purchase: Yes | Condition: New
This is a very good timer. I am using it with LED lights, and it works well, Some of these timers do not work with LED lights. It is fairly easy to program, but I read the instructions first, and them had them handy when it was time to program. I am using this in a 3 way circuit, and it works properly. It will also work in a 2 way circuit.
Verified purchase: Yes | Condition: New
Unlike most other digital in-wall timers, this one does not require a neutral wire and, in fact ,will control both low and line voltage devices since the switching is fully controlled by the battery. I have five of these in my house and they all have been very reliable.
Verified purchase: Yes | Condition: Pre-owned
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