Using high-quality special music, high-quality moving coil horn, beautiful voice, rising and falling harmonization. Introduce the high precision testing instrument commissioning production, and strict quality management, ensure excellent product quality. Advanced technology, superb technology, uncompromising attention to, the function is outstanding, beautiful music. Easy installation, and does not destroy the appearance effect that the bedroom decorates. Remote control distance, up to 80 meters (open ground). Emission is 12 v battery section, the battery can be used (20 times/day) a year.