22U standard 19-inch rack-mounted structure, black alumina brushed panel, user-friendly handle, advanced titanium polishing process, showing high-grade temperament;

2 support GSM, GPRS and MP3 data formats and audio line playback;

21 GSM input, 1 GPRS SMS input, 1 USB and SD card MP3 input, 1 microphone, 1 linear audio input, 2 power amplification output;

2 signal priority input order: GSM phone, GPRS message, MIC page, the lowest level is MP3 and linear sound source parallel;

21 channel 12V battery or UPS power supply interface, support 12V DC power supply; use anti-DC backflow technology, support AC mains for DC real-time charging, AC and DC power supply seamless connection;

2 Adopt lightning protection technology to support broadcasting in high-risk areas in the wild;

2 Authorization mechanism: There is special software for authorizing mobile phone numbers. Only authorized mobile phones have the right to send text messages and broadcasts;

2 emotional reading text messages: SMS playback has the voice function of the female announcer sound quality;

2 built-in high quality monitor speakers;

2 short circuit, overheating, overload automatic detection and protection function;

2 output impedance: 6-8OHM; output power: 120W;

2 Widely used in mobile vehicles, ports, stations, power stations, flood control and other places that are difficult to route and require high-quality music and broadcast notifications, as well as a wider range of urban and rural broadcast notifications.