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Amazon.com : Ultra-Bright LED Plus …

Underwater USD507366(s).

https://www.snagshout.com/offers/headlamp-flashlight-with-pocket-tool/963a68

All Medium size (Permanent Marker) Small size (Car key / Zippo ).

https://en.wikipedia.org/wiki/Headlamp

https://en.wikipedia.org/wiki/Headlamp_(outdoor)

Amazon.com: flashlights for kids