| 摘要 |
A lock having a body, a face, a shackle and an audio and/or a visual system. The audio system includes a speaker system and a controller, and the visual system includes an indicator light and a controller. The systems also employ a battery and a battery indicator light, e.g., an LED, indicating when the battery needs to be replaced. The audio system emits an audible sequence and the visual system emits a light sequence when the lock is unlocked, reminding a user to lock the lock.
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