Chamberlain CLDM1 Clicker Garage Door Monitor

Quick summary: Both units work very well. The Skylink has a beep in addition to LED indicators. But, the beep starts as soon as the garage door is opened which is annoying. A 5 minute delay on the beep would be perfect for me. The chamberlain can monitor multiple sensors, but only has one LED indicator for all sensors. The Skylink has separate LED lights for up to four sensors of different types.If you want the beep, or want to know which sensor is triggered, the Skylink may be better. Otherwise, both units work great.---I got the Chamberlain first and installed in 5 minutes. The transmitter attaches easily to door with provided double stick velcro. The receiver (with green/red LED indicators) has to be plugged in, which does limit the choices for mounting. In one month of usage I had to reset it once because it was showing the garage door open when it was closed. As another reviewer noted, simply unplugging the receiver and plugging it back in fixed the problem. If the door is closed a green LED shines, if open a red LED blinks. Odd that the red LED is dimmer than the green LED.I thought it would be nice if it would also beep when the garage door is left open so I tried the Skylink GM-318. I got the Skylink today and it installed easily. I did have to fiddle with tiny dip switches on the transmitter and receiver, but it was pretty easy with the supplied tool. I think the receiver works from a bit farther away than the Chamberlain.I was disappointed with the beep feature because it starts beeping as soon as the door is opened. I don't think my family will appreciate the beep when I leave for work early in the morning. If Skylink (or Chamberlain) reads this, it would be really nice if the beep could be configured to start beeping after the door has been open for 5 minutes. The beep volume can be set to off, low, or high with a switch. It also has a mute feature which you can press if you know the garage door will be open for a while. When the garage door is closed, it automatically turns off the mute and goes back to normal operation. The Skylink uses a different kind of sensor than the Chamberlain that is mounted at the bottom of the door with supplied two sided sticky tape and has a pencil shaped sensor that senses the floor of the garage pressing up on the pencil shaped sensor. The sensors for both units work well and appear to be well designed.Overall both units work well. If the Skylink had a delay on the beep, I'd like it better, but I'll probably turn off the beep to keep from annoying my family and my dog. The Skylink can monitor up to 4 devices with a separate LED light for each, and a different beep pattern for each. Skylink has sensors that can monitor garage doors, motion sensors, water sensors, and other types of sensors.

I installed this garage door monitor a few weeks ago. I was a bit skeptical of its operation & durability given the relatively inexpensive price. It has proven me wrong. The monitor has operated perfectly and appears rugged enough, and simply enough designed that I expect it to continue for years. (I've no idea why "clicker" is in the title. Some people refer to their door open/close remote as a clicker, but be aware that this device does NOT open or close the garage door.)The position sensor is mounted high on the garage door with double sided adhesive tape. That location allows it to sense the position change from vertical to horizontal even when the door is only partially opened. It also keeps it above the cars so that its wireless signal does not get attenuated. The receiver can be mounted anywhere within the house in 6' proximity to an a/c outlet. I plugged the receiver into an outlet on the 2nd story above the position sensor at an RF range of about 45-feet. I chose not to mount the receiver at all, but just laid it on a shelf with its antenna extended. When the position sensor moves from vertical to horizontal (door open) it sends a brief wireless signal to the receiver. The receiver shows open with a slow flashing red LED. When the sensor moves back to vertical (closed door) it sends a 2nd signal that changes the receiver display to a constant green LED (door closed indicator).The position sensor uses a small (included) coin-sized (lithium CR2032) battery. Because it does NOT send a constant signal, but only a brief transmission on position change, the battery should have a relatively long life - easily replaced every 12-18 months with an inexpensive replacement battery. The receiver uses a/c power so requires no special care. The purchase of an additional door open & close remote unit will allow the door to be closed without a trip to the garage. No reason to leave the garage door open all night again in the "inviting" position. At this price point - its hard to go very far wrong... highly recommended.

I have this product working for about a week now, and I am very happy with it.Yes, it could have been better, but given the number of times I had to walk outside to check on that garage door, it it going to return its cost within the next week or two...Pros:- Trivial to install. Anybody can.- Works...Cons:- The home-based receiver is not battery operated, and has a bulky, wired power adapter. I was not surprised as I read it in the Amazon reviews prior to purchasing (thank you previous posters!), but my original intention was to hang it on the wall next to the wireless remote opener. It won't make sense without a battery operated device. Instead I had to put it on one of the cabinets, with the wire, power adapter and antenna hidden behind the cabinet. Well, that works.Notes:1. My garage door is only 20 ft from the receiver, so I am not challenging the range and it has not failed so far.2. It may be trivial to mention, but when choosing on which side of the garage door to mount the sensor, choose the one closer to the receiver.3. Initially I thought the sensor is magnet based, like the one used in window alarm sensors. But in fact this is sensor is mechanical, and indicates open/close according to its physical tilt position: when it is vertical, it means "closed". As the door rolls up the sensor soon flips to become horizontal, with its back pointing and parallel to the ceiling. This flipping probably translates into flipping a switch, which starts transmitting "I am open".While great for most garage doors in the USA (and surely for me) it is important to know that it won't work with any other situation where the door does not roll up and turn from vertical to horizontal.