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Keychain series. .

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

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

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

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

Fenix Flashlight, Headlamp, Fenix Flashlights – BrightGuy, Inc

LED Bicycle Headlight and LED Headlamp | LED Bike Lights …