● All-metal shell, anti-corrosion brushed aluminum panel. ● Compact and lightweight design, sturdy and durable.
● Two-way full duplex voice communication with IP audio intercom master station in the master control room.
● Hands-free wall mount panel with built-in microphone and speaker.
● NAS-8521B: Single-button design for one-touch calling to the designated target intercom device.
● Tamper alarm functionality enables the device to trigger a warning siren whenever the panel has been forcibly damaged.
● User-defined ringtones for phone call connected, busy line, target hang up, etc.
● Work specifically with SPON® NAS-8521 IP split-type audio intercom controller via daisy-chain connection.