Motorcycle Siren Lock

                     

Description:
 * The product has a function of alarming when it is touched or
    shacked.
 * It has 110dB output when alarming.
 * When it is locked, it goes to the state of alertness after
    5-10s automatically.
 * When someone move your motorcycle or lock, the lock will give
    out strong alarming signals and the signal disappears around
    20s automatically.
 * The lock goes back to normal to its alertness state when it is
    opened with key.                         
 * The unit works on a 9V battery with low power consumption.