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Nyctalopia always have trouble unlocking the door at night, especially when they are holding too much stuff and do not have their hands free. Luminous Key Chain is designed to help people accomplish the whole action of unlock only by one hand, and provide light source at the same time.
luminous key chain is portable and lightweight, which includes LED and a sensitive switch that connect to a button cell. When users want to unlock the door, they only need to hold the key by one hand, shake it up and down quickly, the inertia is forceful enough to turn on the sensitive switch, then the LED will light up and illuminate the key hole.