This is an alarm clock used by a deaf person, the disc is placed under a pillow or mattress to wake you up : r/interestingasfuck
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11 Best Loud Alarm Clocks for Heavy Sleepers 2023
11 Best Loud Alarm Clocks for Heavy Sleepers 2023
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Best Alarm Clock For Heavy Sleepers (Updated Mar 2023) - Buying Guide
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11 Best Loud Alarm Clocks for Heavy Sleepers 2023
11 Best Loud Alarm Clocks for Heavy Sleepers 2023
