Network PA System – 4G Sound & Light Alarm Device (Voice Alarm, SMS/TTS, Sensor Monitoring)

Features:

- Supports three communication modes: wired network, 4G, and LoRa.
- Supports network communication functions.
- Supports collection and upload of equipment ambient temperature and humidity.
- Supports collection and upload of power supply voltage.
- Supports phone/SMS broadcast (supports up to 300 characters and broadcast times; does not support speech rate and language setting).
- Supports platform text‑to‑speech broadcast.
- Supports acquisition of latitude and longitude positioning information, and uploads it to the platform via 4G network.
- Supports acquisition and reporting of equipment 4G and LoRa signal strength information.
- Supports OTA remote management and upgrade.
- Supports pre‑set MP3 audio files for alarm announcement.
- Supports reporting of sensor connection status information and threshold‑linked alarm.
- 1×RS485 interface, 1×RS232 interface for printing and debugging.
- 1×short‑circuit input, 1×short‑circuit output; 1×tri‑color indicator light.
- Dual horn speaker for sound amplification.

This **Network PA System** alarm device integrates multi‑mode communication, sensor monitoring, and voice alerts for reliable public address voice alarm applications.

Technical Specifications:

- Operating Voltage: DC12V 10A
- Audio Amplifier SNR: ≥70dB
- Audio Amplifier Rated Power: 2×25W
- Audio Amplifier Rated Impedance: 4Ω
- Audio Amplifier Frequency Response: 300Hz–13KHz ±3dB
- Total Harmonic Distortion: ≤10% (1KHz)
- Audio Output Level: 1V (0dB)
- Operating Ambient Temperature: -20℃ ~ 65℃
- Operating Ambient Humidity: ≤90% RH (non‑condensing)
- Product Dimensions: 510×235×420mm (L×W×H)
- Weight: 7.1kg

In summary, this **Network PA System** 4G sound & light alarm device with SMS/TTS broadcast, sensor reporting, and dual‑horn output is the ideal choice for remote monitoring, emergency alerting, and public address voice alarm in schools, factories, campuses, and outdoor facilities.