1. It conform to national standrad GB8108-1999.
2. Special super-thin design, harmonious with inner decoration.Case is all metal PAINTED black enamel.
3. Adjustable metal chrome plated swing bracket, provided.
4. Novelty structure, attractive design, excellent, excellent performance, complete function, convenient operation.
5. Monolithic Integrated circuit in steadier performance.
6. Volume of amplifier tone and warning tone are adjusted are your option.
7. Handhold mike with light controller; Sound compression level: 110-120dB