Features: 1. Set network audio decoding and digital power amplifier in one. 2. Using high-speed dual-core chip, startup time ≤ 1 second. 3. Adopt three-level lightning protection chain composed of imported lightning protection devices to ensure the safe use of equipment. 4. Built-in class D power amplifier. 5. Support remote volume setting and remote power on/off. 6. Built-in loop signal acquisition function, which can monitor the working status of the speaker remotely and maintain it easily. 7. Standby state completely cuts off the power of the power amplifier, reducing power consumption and ensuring terminal reliability. 8. The whole machine adopts the aviation aluminum profile outer casing, which is beautiful and generous, and does not rust for a long time. 9. With overcurrent, overvoltage, overtemperature, short circuit protection, stable performance. 10. The whole machine adopts modular and plug-in design for easy maintenance. 11. The circuit adopts multiple moisture-proof, anti-corrosion and anti-salt mist treatment to ensure normal work in harsh outdoor environments. 12. Expandable connection LED screen, display emergency information, notifications, program list, weather forecast and other information. 13. Scalable solar or battery powered. 14. Support RJ45 interface and WiFi access, support WAN, LAN, VPN. Technical Parameters: Product Name and Model: IP Broadcast Retractor XF-IPPA50 Power supply, power consumption: AC 220V, XF-IPPA50 ≤ 60W; Network communication protocol: TCP UDP RTP ARP ICMP IGMP Network chip rate: 1000Mbps Audio sampling, bit rate: 8kHz ~ 44.1kHz, 16 bits, 8Kbps ~ 320Kbps Signal to noise ratio, audio frequency response: ≥90dB, 200Hz-18KHz Amplifier power: XF-IPPA50: 50W; Working temperature, humidity: -10 ° C ~ 50 ° C, ≤ 90% Size, weight: 190mm*150mm*370mm 3.96kg