uni direction speaker 15W incl. 100V line transformer

Technical datas
Input power: RMS 15WOutput power: 3.75, 7.5, 15WSpeaker: One 5.5" paper/ plastic cone speakerInput voltage: 50, 70, 100VImpedance: 100V-2,66 kilo-Ohm/1,33 kilo-Ohm  /666 Ohm 70V-1,33 kilo-Ohm  /666 Ohm /326 Ohm 50V 666 Ohm/326 Ohm/166 OhmFreq. response: 150~20 kHz 94 dB (1W/M) Material: ABS resin