ANSWER: we have Genie openers on them we stripped the coax back the instructions show how it does help with range of the remotes by R I a

ANSWER: Not at home, will check and let you know. I can tell you that it worked great at first but is now acting the same way as before. We have to drive right up to the door, roll down window, put remote out of window and press button several times before it opens. If you come up with another idea, I would sure appreciate the information. Thanks lester by C A a

ANSWER: I believe it screws on. It is a relatively simple set up. It's just a standard antennae coax cable connecter on one end, the other end you strip to attach to the opener chassis. by W I a

ANSWER: Neither one. U have to cut one end off and strip the wires to connect per the instructions by D G a

ANSWER: Neither, you have to twist the cables together on the opener motor. The only part that twists on is actually at the new antenna. Don't worry it was easy to do. by N I a

ANSWER: It's been a little while since I installed this antenna but if memory serves me right the cable screws on....I have it in the attic and I don't want to go up there again to verify....sorry but I hope this helps a little. by B O a

ANSWER: Mostly likely your existing garage opener does not have the male adapter for the antenna. So you need to cut off the one end of this antenna cable & splice it to the hanging antenna of the opener. Make sure you also connect the ground wire of this cable to any metal part of the housing of the controler.<br /><br />The kit comes with instruction which should help. The antenna also help the reception a lot. Good luck. by T C a

ANSWER: Neither with my unit. I had to cut the plug off one end of the cable and actually attach the ground wire out side branded mesh wire to the frame of the opener and screw the center wire to the appropriate screw on the control board. I went by the instructions that either came with the ant. or I got from Sears the manufacture of my unit. You have to mark off about an inch or so of the cable and pull the center wire through the outside wire mesh shield at that point. That should leave you with the center wire and the outside shield wire as 2 separate wires. Good Luck . by J O a

ANSWER: Actually I had to cut one end of the cable off and and twist tie cable end and antenna end together. The antenna on my unit was just a wire. Hope that answers your question by R O a

ANSWER: The antenna side screws on , but the garage door opener side needs to be cut and stripped so you can attach it to the existing antenna wire from the unit. by P A a

ANSWER: My apology, but while I am pleased with the performance of this product, I do not know if it will work with a 3800. by P E a

ANSWER: Yes. by T C a

ANSWER: Not sure what a '3800' is But this worked very well on garage door opener. Basically is connects to the existing antenna wire from the motor unit and you run the wire to a better location and install the antenna there. by M E a

ANSWER: We did not find this device effective in extending the range of the garage door opener. by P P a

ANSWER: I would say yes, as long as your opener has an external wire antennae. by N I a

ANSWER: Hi kristy<br /><br />Yes it will work for any liftmaster. It took me 20 minutes to install. Now<br />It will open my garage door when I am 175 feet away by B I a

ANSWER: If I had to guess I'd say yes, but I really don't know. Wish I could be of more help. by W I a

ANSWER: I can't speak for every opener, but the one I have also has the purple button. Before I installed the kit, I could not open the door consistently without walking to a garage window and using a handheld remote. I have a built in remote on the mirror of my Mini, so that wasn't always an option. With the antenna installed, which too about 30 minutes, my handheld remote works from about 100 yards, and the built in remote works from outside the door. All on all, a really big improvement. by James W a

ANSWER: Yes. by T C a