> Professional integration wall mounted design, the configuration is very sturdy, the speaker case meet with sound resonance principle, very elegant and beautiful appearance. > Adopt embedded computer and DSP audio processing technologies, high speed industrial chips, the start up time is less than 1 second. > Built-in one network hardware audio decoding module, support TCP/IP, UDP, IGMP(multicast protocol), realize the network based transmission audio signal of 16 stereo CD-quality stereo tone. > Built-in 2×20W digital amplifier, 1 channel connect with main speaker, the other connect with assistant speaker. The sound quality is delicate and strong power, speaker with network volume setting. > 1xAUX input, with independent volume potentiometer control, support offline local paging function. Support Reduce silent strength preset function and background ccompaniment preset function. > Built-in analog audio signal back-up module, support constant 100V signal input, when the device detects network failure or equipment outage, it will switch to constant input signal automatically to realize double line redundancy. > Built-in 2 level priority setting: 1. Network voice alarm signal prior to AUX and Network BGM signal. 2. AUX signal prior to network BGM signal. > Support local AUX and Bluetooth signal input to realize local amplification after internet off. > Compatible with router, PBX, gateway bridge,Modem, Internet、2G、3G、4G IGMP and other network structure. > Digital products, convenient extension, no limited by geographical location, no need to add administration equipment, adopt the design conception of network free line construction, installation is very easy. > 2.4G handhold Bluetooth microphone with MP3 player.