Using your ULAC Bulldog cable lock is easy. First, make sure the batteries are properly installed. Then, loop the cable around your bike and the object you're locking it to. Insert the key and turn it to lock. To unlock, just insert the key and turn it the other way. When carrying the lock, use the transportation bracket system for convenience. Store it easily with the ULAC velcro. Keep in mind to replace the AAA alkaline batteries when the alarm sound gets weak. Avoid exposing the lock to extreme temperatures and moisture. If the lock gets dirty, you can clean it with a dry cloth. This will help keep your lock in good condition and ensure its long - term performance.