
Weahterproof IP68 Emergency Tunnel Prison Outdoor Telephone. IP68 Weatherproof Design: Aluminum enclosure with 9mm thickness ensures durability in harsh outdoor environments. Strong Noise Cancellation: Optional exclusive technology effectively cancels noise for clear communication. High Power Amplifier: Built-in 30W amplifier and 3W/90dB buzzer ensure audible alerts in loud areas. Flexible Power Supply: Supports PoE, Gateway, or External Power Supply for versatile installation. Customizable Options: Offers full customization including IP-SIP/Analog, colors, and logos. International Certifications: Complies with CE, FCC, and RoHS standards for global safety and quality. Low MOQ for Trials: Minimum Order Quantity is just 1 piece, ideal for testing and small projects.