The Built-in Polymer Battery USB direct charging function, which can be charged for 2 hours, and the LED light can be used for up to 30 days.
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Smart Alarm System activate the smart alarm system with one click in an emergency, can emit an alarm sound of about 100 decibels to make your travel safer.
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High-quality LED Lighting Chips 380-780NM electromagnetic waves, and more uniform light, to ensure bright and clear vision for the elderly.
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