※ balanced first-class indoor wall speaker, walnut wood box, high-grade atmosphere; ※ configuration 4.5-inch full-frequency high-fidelity speaker unit, beautiful voice, high degree of voice degradation; ※ built-in Class D 2 × 20W power amplifier circuit, sound quality, power strong; ※ high-fidelity stereo design, professional CD-level sound; ※ flexible connection port and quick installation, easy to use; ※ AC110V ~ AC220V wide voltage power supply; ※ 1 channel stereo input, 1 microphone input, 1 100V constant pressure signal input; ※ Each input channel has a sealed potentiometer volume adjustment knob; ※ is very suitable for school multimedia classrooms, conference rooms and other places;
