A radio code lock for motorized garage door motors can not only makes the daily" and to "the garage doors, but also serves as a reliable security key. With the four-digit PIN code is the motorised drive system the garage activated comfortably and is reserved to only those who receive the access code. You can also use other selected persons via a temporary PIN access, even when nobody is at home. Hours long waiting times on packages, craftsmen or on friends, for the next barbecues already want to shut off the drinks are now a thing of the past. Even if the children arrive at home, the access with a radio code lock easier and safer than with a hand-held transmitter that is easy to lose. You can easily change the PIN code at regular intervals, so that no one unauthorized access to your garage or your house can give. The Radio code lock 747 REV is compatible with the chamberlain garage door drives ML510 EV Basic (order no. 1547041), ML 700 EV Comfort (order no. 1547042) and ML 1000 EV prem