This ungrade receiver kit is composed of an add-on receiver and a very handy key ring remote.
Installation of the receiver couldn't be easier. Just hook up the three "forks" onto the corresponding screw terminals on the back of your opener as shown in the diagram below. Then it's done!
The new remote has already been pre-programmed so you can use it straight away! Plus, your existing remote will still work (well, if it does work), no conflict with the new ones.
A more value-for-money kit MK702 with two remotes is available.