110dB Alarm lock siren alarm padlock for door/motor/bicycle lock SIZE Big

This is an alarm lock with two modes.After unlocking, please remove the shackle and insert it back in the opposite direction to activate the alarm mode.Inserting it in the original direction is normal lock mode (no alarm).110 dB alarmWater alarm, waterproofAutomatic alarm system and locking alarm systemThree soundsAutomatic resetLock bar heat treatment hardened stainless steelZinc alloy bodyCorrosion resistance to salt and bad weatherAnti-drilling lock beamMobile alarm moduleDouble impact and motion digital sensorsReplaceable electronics6 electrons (digital watch style)Electronic life: 6 months, with an additional 6 electrons