IP AUDIO SPEAKER(INDOOR 2x10W) NAS-8507A Datasheet Manual Firmware FeaturesWall-mounted design.Integrated with network audio decoding, digital amplifier and speaker.Adopting high-speed industrial grade dual-core (ARM+DSP) chip, with start-up time ≤ 1 second.Built-in Hi-Fi speaker and stereophonic Class-D power amplifier (2×10W/8Ω).Equipped with 1×3.5mm Audio Line Input interface which can be connected to external audio source.Equipped with 1×3.5mm Audio Line Output interface which can be connected to active speaker.Equipped with 1×Amplifier Output interface which can be connected to NAC-301C (10W) auxiliary passive speaker.Built-in loop detector to remotely monitor the operating condition of the speaker, easy maintenance.Supporting remote volume adjustment of the speaker on the server software.Supporting rotary knob volume adjustment of the local audio input.Equipped with standard RJ45 interface, accessible to the system wherever Ethernet is available, supporting cross-segment and cross-router.Optional: constant voltage backup module (automatically switch from “IP public address” to “analog public address” whenever network anomaly occurs).Optional: NAC-301C (10W) auxiliary passive speaker.Optional: wireless receiver module & NCS-29 2.4G wireless microphone.