Product Description
This Allstar (Allister, Pulsar, MVP and Challenger are all the same manufacturer) gate and garage door opener is the most common.
Most Challenger gate and garage door openers use the same radio controls (remote control transmitters, keypads, reveivers...) as Allstar, so any of the Allstar items will be compatible with your Challenger garage door opener.
Just make sure to look at the number of positions per dip switch (there are 2 formats, on/off, called binary or +,0,-called trinary and most importantly the frequency (that information is located on the back of the remote), the frequencies could be 318 or 288 MHZ.
Garage door remote control
1 Button trnsmitter
288 or 318 MHz Frequency
Nine (9) 2-positions (binary) dip switch format
Same as (ADX921)
hand held remote w/visor clip
FCC ID: NM483PTRAF