Can be used in many cases, such as: ignition, medicine, ...
Electric shock ability helps you protect yourself at night to avoid bad guys
High capacity lithium battery plus USB charging cable, can be charged with any device
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Product name:
Self-locking key with flashlight
Material:
High quality aluminum
Battery:
High quality Lithium battery, charged by phone charger, power bank. Full charge after 2 hours. Use for up to 15 days.
Characteristics:
Direct current causes numbness within 5-10 seconds, prolonged exposure can cause fainting, not fatal.
Automatic shutdown when resuming power for 10 -12 seconds for protection, then can be pushed up and down to resume use.