Description fails to state the device will not work with all garage door openers and may need an external power supply. Had to return.

I had problems with my item so I contacted smarthome who handled the return with no problem. However, All I really wanted was someone to trouble shoot the product. They couldn't do that and wound up returning it for another. I'm currently at square one, you had to send a replacment and nothing was resolved. As far as customer service on the return, A+++++

The item was very easy to install. I put one on both garage doors. I sometimes have a problem where the door keeps opening and closing multiple times before finally closing.

Bought two units. One for each door. One would only work if the garage was empty. The other worked fine except it would open the door after it was closed.

The receiver unit did not function out of the box. I sent back the unit and got a refund but I had to eat the excessive $10 shipping charge. I should have read the other reviews on this product before ordering it. Many people have been sent defective units.

Haven't been able to make this thing work yet. Very basic instructions for what I thought would be basic setup.

Had a problem with the first unit. Smarthome replaced it promptly. The new unit has been in use for 1 year, and works flawlessly. I wouldn''t be without it. It was very easy to install.

Unreliable product. The first one stopped working a few months after we bought it. I returned it to SmartHome and re-bought another unit but that one doesn't work at all. What good is a door closer that can't be counted on to close a door? This product is unusable. Smarthome should stop offering this until the manufacturer can improve its quality control. Extremely disappointing. It is going back.

The instructions did not have any reference for four wire systems. When I pulled my existing Genie unit off the wall, there were four wires attached. The directions offered a number of two wire connection options, but none for four. Also, when I open the garage door from upstairs using my existing Genie remote control, the door opens just fine. However, when I get into my car and drive out of the garage, then close the door using the remote control feature programmed in my car, the door closes but does not deactivate the unit's automatic timer. Sure enough, a couple of minutes later, after I'm long gone, the garage door opens automatically. In order to remedy this problem, I have to make sure that I tap the door closer button before getting into my car and driving off. This manual deactivation is inconvenient, but unless I want my garage door to automatically open after I've departed for work, I have no choice. I look forward to your suggestions. Thank you.

... To add to my previous review .... In my attempts to get the unit(s) to work, I also contacted the manufacturer several times. They instructed me to buy a 12v transformer, which I did. The unit still did not work properly. I then thought the two pieces might be too far apart (16 feet), so I moved the transponder closer (9 feet), it still did not work properly. The manufacturer's help was dismall - they could only suggest a 12v transformer, else send the unit back to them. Fortunately, Smarthome has an excellent customer service department and return policy. They even gave me free shipping on my next order. I will continue to buy from Smarthome - after 3 different units failed I simply DO NOT RECOMMEND this product.