12V Timer Switch - Programmable, DC/AC/Solar Battery Powered | 12 Volt JVR Timer Relay

works great hook my portable refrigerator up to it, so it doesn't run all night draining my 24 volt batteries 6am to 8pm 24 / 7

This a great timer use it for a wash tank with a bilge pump has not let me down yet.

Haven't got to use it yet but seems ok

These are really slick & reliable. I have two - one that I've had for over a year and another I just received. They state up to 16 on/off programs but my new one actually has 28! I use one for cycling 12v power to my wifi router for a nightly reboot. The other I use to cycle 120v power to my laser holiday lights because the laser lights otherwise only stay on for 6 hours. I took the holiday lights down last year and one year later I took them out of storage and the programs and clock were still held in memory and still accurate. As noted the battery keeps the memory but the relay only operates when 12v is applied on the power terminals. But you can cycle off the 12v power as I do with my holiday lights at dawn, then when 12v is reapplied (at dusk) the timer operates the relay again on the set schedule. One thing the manual does not mention is that you can also adjust the seconds for each on/off time. To set seconds, when you are in program mode for any on/off sequence, just press the "manual button" to advance the seconds - it shows the seconds on the screen, in addition of course to day, hour, and minute. So for the router I use just one program set to on at 2:00:15 and off at 2:00:00 - therefore off for just 15 seconds at 2:00 AM. Really slick, love these!

The device does not completely cut off the current, it lets 4.5v through, it is of no use to me, and I cannot return it, it is more expensive to return it than to throw it away.

It took me a while to find how it works. 2 things to know : 1. After configuring the prog, you must push the button clock then it works, if you don't it won't work, 2. it works only with a power source on the 12V, if no power, the clock is on but that doesn't activate the switch.

I have a couple of batteries hooked up to solar panels and 4 or 5 RV lights for my Chickens and Goat sheds and pens.Given how cheap this was, I'm shocked how well it works. I hooked it up, outside but under cover, to the lights in the chicken run. It turns on every morning at 5:30 and off at around 8 so the chickens have light in the morning, grey and rain here in Seattle.

I installed this timer on my RV to control some of the exterior 12 volt lights so I dont have to manually turn them on and off every night, and the lights will still turn on for nights I'm not at the rv.I'd say the quality of the product is about on par for chinese products manufactured soley for cost, rather than longevity or quality. Case in point, the device has an internal watch battery, which makes a lot of sense. Unfortunately the plastic housing will obviously be a nightmare to open and probably break the first time I need to replace the battery. There are a thousand ways that this could have been designed so that it lasts, but it isn't.As for functionality so far so good, but I only implemented last week. I don't have high expectations that the device will stand the test of time, I'm certain the components are of the cheapest quality.The device comes with instructions but they are subpar like most chinese products of this sort. They are in broken english, unclear - especailly when it comes to the quirky programming (again because of poor software/systems engineering), and far from complete. At least there was a simple elecrical diagram that made my implementation possible, but if I were doing something different, such as using 12v dc to control an ac circuit I'd be very unlear and worried about cooking things - either cooking the device or worse the fire department coming for a house bbq.Overall, the device works for my dc implementation for today. I'd absolutely prefer an American made product of much higher quality rather than "chinese garbage", but unfortunately these are the only products available for this type of application these days.