Hanging type wooden shell , size: 43cm*`34cm*12cm; Demand to design for the language teaching of high-fidelity specially; Adopt SW resonance device ; Struck by lightning and protect the function, output power≥5 W, one pair of loudspeakers of sound at last; Wired when receiving, flat 35 ± 5 dB, electromechanics of automatic switch. The standby state cut off power completely, Receive frequently booked by users