... to the desired (code) you will remember, make a note off pass-code, you can now release the ... (2) types of batteries, 1. moblile phone type battery (A123) 12v. for A,B,C buttons operation, this battery ... do not work on more than one unit at a time! you can damage the components of the ' ... signals. Therefore, press the key-button for more than 1 second. MAINTENANCE: *Units come with life-long warranty, ...