Review on GENTEX GENK40A Auto Dimming Rear View Mirror: Enhance Your Driving Visibility by Gent Dobson

Very good product. Looks factory, works great. I had no problems with an old garage door opener. But Homelink wasn't working with my new Chamberlin garage door opener. After calling Chamberlin and Homelink, Homelink sent me a repeater for a new garage door opener. Now everything worked fine. But in order to use the backup battery on the new opener, I have to keep the handheld remote in the car. Also, with the repeater, the security code on the Chamberlin garage door opener is now useless. I am happy with the facility. And he does what he has to. But it would be nice if it synced without a repeater to be able to have a rolling code and backup battery in the car without an extra remote control. Homelink shipped the repeater for free, I just had to pay for shipping.