TOPGREENER Digital Astronomic Timer Switch, 7-Day Programmable Sunrise Sunset Timer for Lights, Fans, & Motors, Single-Pole or 3-Way, Neutral Wire Required, UL Listed, TGT01-HN-W, White

Love the timer. It is very functional. The features are good and easy to use once programmed. I have been using 2 of these timers for several weeks now. Programming was fairly easy but I am pretty familiar with these types of electronics. I like the blue light backlight. It only comes on when you push the button which is good to sit is not lighting a dark room at night. There were also some complaints about this timer not fitting a regular wall plate. I am using the leviton decora style wall plates. The timer fits those perfectly. You DO need a nuetral wire to be able to use this timer which is the case with most of these type of timers. I hope the rechargable battery stays good for more than 7-8 years. I don't like changing things often after I put them in because I am a very busy person. I don't have time to deal with swapping things out. I don't see that the batteries are replaceable so I will just plan to replace the entire timer when that happens. I have 2 of them side by side so I will likely need to replace both if they don't make the same style when the batteries go bad.Directions need some work. It is not clear how exactly how to set the dawn to dusk feature. I doesn't really tell you that the dawn to dusk button is the one with the little moon and sun images on it. You need to press program, then press set , then press the dawn to dusk button for moon to set the on setting. The instructions fail to tell you to press the set button, then the dawn to dusk button. I did call customer support before I bought this timer to ask ask about using it with a dimmer. They said you can't use it with a dimmer. They did not have someone available to answer my questions but did call back within several hours. Also, I found out that you can use it on a 3 way set-up but I think you MAY need to make sure it in the right spot within the wiring run. If you wiring 3 way and it is not working, call customer service to ask about that.That all being said the timer is still great and I would buy it again.

I purchased this digital timer switch to replace an Intermatic 24-hr in-wall timer that failed after 10 years. This timer switch is used to power a bathroom exhaust fan and set an automatic timer so that the fan runs to circulate the air in the bathroom for a portion of the day.Wiring - Simply follow the instructions to wire in the new digital timer switch (make sure you flip your breaker switch OFF to avoid potential electrical jolts). My particular installation had 4 wires...black (hot)/white (neutral)/red (load to the fan)/and a bare ground wire. I attached the 4 wires to the corresponding poles on the switch, turned the breaker switch ON, and it powered up and worked like a charm. If you're using this switch as a replacement for another existing in-wall timer switch, pay close attention (take pictures) to how that switch is wired before you remove the old switch. That will likely be the best guide for where the wires go on this particular digital switch. It's not that difficult - just keep in mind that for electrical wiring, most often, the white is neutral, black is hot, and red is typically a load wire. Ground wires are always bare (copper) or green.Programming is easy...after setting the time, date and year, hit the program button, set the time you wish your fan or light to power on automatically, then choose the days of the week. Finally, set the time for switching the fan OFF in the same manner. Close the little door (which acts as a button to manually turn the fan/light on or off) and you're done.The best part about this digital switch is that it's half the cost of another Intermatic in-wall dial/mechanical timer switch (runs $52 plus tax) and is much easier to deal with, plus it looks a lot nicer on the wall. It even adjusts for daylight savings time automatically which is another bonus. No more flipping down tiny little switches on a mechanical dial that is doomed for failure years down the road. The TOPGREENER digital switch also has a built-in backup battery in case power goes out.Overall a great product and perfect for replacing those Intermatic in-wall dial timers that are rather ugly and aren't likely to last since they're mechanical, inaccurate, and prone to failure.

It was easy to program and works well. The BN-Link 7 Day it replaced was bad out of box and hard to program. This replacement working great so far and easy to program.It was worth the extra few bucks compared to BN-Link 7 Day.

This thing installs easily, sets up easily, and then you can forget about it and let it take over. The sunrise and sunset schedules for the whole United States are stored in the unit. It is not connected to the internet in any way. It's based off zones of the U.S. so it is an approximation of sunrise/sunset, but it is a very good estimation and is right on time. Just leave your switch on 24/7 and let it cut the outside lights on and off. I bought two at the same time, one for the garage outside lights and one for the front porch lights. Works like a charm. I recommend this product. Prior to using these I had Smart bulbs. When one went bad I had to buy another just like it for about $25 because it must match the other bulb and the smart app for that bulb manufacturer. The front porch was one app and garage was another app. It that wasn't bad enough, one was 5 mH and the other was a lower mH that was no longer supported by our router, so I had to use an older router just for that set of lights. The Smart bulbs were always doing crazy things like blinking non-stop and losing connectivity to the internet, at which point they wouldn't work correctly. Now I can just use standard bulbs from any manufacturer. I now feel so free and can let the units do their work with no intervention from me. Yes, very freeing indeed!

Easy to use

Installation was a challenge until I re-read the directions. In a three way installation, one of the three way switches has to be replaced with a single pole switch. Which will still work as before. It also appears to be very well made and even will save the settings if the power goes out.

Timers work well so far, auto adjusted for daylights savings time. Replaced an existing switch in a 3-way circuit. Since this switch requires constant power this required some rewiring. Easy to turn on/off without having to turn the timer off.

I have had these Astronomical Timers operating for several months now and I am very pleased with their performance. Our house now looks great in the evening at dusk with the outside lights on. I had zero problems setting them up to perform as desired after reading some earlier reviews and setting them for the correct North zone (and not our time zone as I originally thought). My only issue was struggling to align them correctly as mine are in a four switch gang box. Patience getting that right is an asset that was tested to the extreme in my case but eventually accomplished without any modification to the new plate cover after I broke the original one. I can recommend these switches as they seem to be "Set it and Forget it". Whereas I have couple others that require periodical adjustments though out the year that is annoying.

Switch was easy to install and works well. The setup instruction however are very sketchy and one has to read between the lines and use a lot of common sense to program the switch properly.

This timer stopped functioning after a little over a year. Too bad TOPGREENER warranty is 1 year and they will not replace the unit. You would think an electrical product like this would be designed to last.It worked fine a year, was fairly straightforward to setup & install, and turned the exterior lights on/off at dusk/dawn. Then it stopped working.1) The timer will not pass power onto the load side, even when you manually turn it on. Tested with power meter.2) The timer won't hold date/time settings. I set the current date/time and came back to check the following day and says it's 2017 again and the time is incorrect.Had to remove and throw it out. I find this very frustrating.

It's very good, you can left it all the way after all the settings finish.