Railmaster DHB28 8 ohm, 2 watt, 28mm x 28mm x 13mm(1.1” x 1.1” x 0.5”) ,self enclosed box speaker Keith 5 years ago Railmaster DHB28 8 ohm, 2 watt, 28mm x 28mm x 13mm(1.1” x 1.1” x 0.5”) ,self enclosed box speaker