Type: Horn Speaker Impedance8 Ohm at 1 Khz Voice Coil:Dia. 33mm Magnet:80 *40*12 mm Reson Freq:800 To 8 KHz Power Rating:20 W(RMS) Min Spl:103 dB/W/M Housing:White ABS Plastic Oper.Temp.:20 T0 60 F Weight:1050 g