This is a good product. Small enough to fit comfortably in a pants pocket. Able to put it on a key ring. Works from 3 houses down the street. Shipping was as advertised.
I had previously bought the 300 frequency version of this and had to tweak it to get it to work with my Stanley garage door openers. This 310 frequency version worked great right out of the package with no tweaking required!
Works w/ my old Stanley opener 
