WatchLock® Truly innovative, the award-winning WatchLock® combines GPS and GSM technology with Mul-T-Lock's High Security locking to create a padlock that protects and communicates with you - no matter where you or your assets are. Among other things, WatchLock® notifies you where it is, if its been accessed and whether its batteries need changing. Ideal for any number of applications, WatchLock® is especially useful for remote and traveling assets. WatchLock®. Locks. Alerts. Secures.