Rating: NNNNN
Sourcing its 115 decibels’ worth of controllable, foghorn-like blasting power from a compressed air bottle that fits in your crossbar holder and can be refilled with a tire pump, the Airzound II is a city cycling must-have, especially when your’re trying to get the attention of some bastard who’s driving while on the cell with windows rolled tight, AC blasting and the music cranked.
$19.95, Velotique , 1592 Queen East, 416-466-3171, www.velotique.com.