Self-Charging Smoke Alarm

Smoke Alarm recharges every time you flick the light switch on.

Screw this unique smoke alarm into an uncovered ceiling light socket, then screw a bulb into it if you’d like, and you’re set: the alarm’s built-in back-up battery will now recharge every time you turn on the light! Full charge can last up to 30 days without the light switch being turned on again; a full charge requires the light switch to be on for a total of two hours (not necessarily continuously). Alarm fits any standard-base light socket or ceiling fixture (without a globe), and takes a maximum 60w bulb. Includes 85-db alarm, low-battery warning signal, and test capability. UL listed.