driveway dinger $50 + shipping to the lower 48. no, i don't know if it works. i tried blowing into the little black pipe on the back...Nothing. maybe i shoulda plugged it in. the Bell system ringer was in my garage screwed in a rafter. discovered it while putting up some insulation. again, i don't know if it works. i tried blowing into those 3 wires...Nothing. $25 + shipping. thanks, mike roman (the junkyard pirate)