I use a pair of Signal Dynamics devices that serve the same purpose. Ie., they're not the curry flavored. Both units back to back are thicker than a pack of cigarettes but individually only a smidgen larger than a single small box of stick matches. Mine rest (back to back) comfortably under the seat and against the rear mud guard. One of the two near match box size units is for LED light application, which I don't have but it's there in the event I swing that way.