ITC T-6703E Two key Call & Emergency Intercom Terminal (Luxurious type), Embedded PC technology, built-in DSP and high speed industrial chip, Built-in single network hardware audio decoding module, support TCP/IP ,UDP, IGMP(Multicast) protocol, Built-in voice intercom call module, supports full-duplex voice intercom and conversation, Built-in 5W high-fidelity all frequency speaker, Built-in high sensitivity microphone, Built-in monitor function, Support customize call target, Support multiple call strategy, Support preset program broadcasting, IP55, DC 24V