The Grandstream GSC3506 is a one-way public address SIP speaker designed to help offices, schools, hospitals, and apartment complexes build reliable announcement systems to improve security and communication. It features a high-fidelity 30-Watt HD speaker with a frequency response ranging from 110 Hz to 20,000 Hz, ensuring that voice alerts and messages are delivered clearly across a wide area. Constructed from white ABS plastic, the device measures 25.7 cm in width and height with a depth of 11.8 cm and weighs 2.09 kg. It is primarily designed for ceiling installation, which is supported by an included security eyebolt for a safe and stable mount. For connectivity and power, it utilizes Power over Ethernet (PoE) via an RJ45 port, and it includes a USB 2.0 port and power input terminals. A front-facing LED status indicator allows you to quickly check the device's operational state at a glance.