The C1511 network pendant speaker by Axis is a small all-in-one speaker system for indoors, that's ideal for installation on high ceilings. Integrated status LED, The built-in microphone supports 2-way audio communication enabling conversations with people near the speaker and it uses a a preconfigured digital signal processor (DSP) to produce a clear voice every time. Easy to install with just one network cable, Supports PoE (IEEE 802.3af, Type 1, Class 3), Please note: AXIS TC1901 Wire Kit is available separately.