Integral USB/SD/FM Audio Player. Internal Bluetooth Receiver. 100V or 4/8 Ohms Operation. 6 Independent Output Zones. 3 Mic/Line and 1 Auxiliary Input. Mic Priority and Chime Functions. Switchable +20V Phantom Power. 24V Mute Contacts. Monitor Headphones OutputMains Input: 170-264Vac- 50Hz Power: 6 x 40W RMS Siganl Inputs: 3 x Mic/Line (XLR/Jack) & 2 x Auxiliary RCA Speaker Outputs: 6 x Terminal 100V/8 Ohms/4 Ohms/Com Phantom Power: +20V Switchable to each XLR Frequency Response: 100Hz - 24kHz Dimensions: 433 x 89 x 403mm Weight: 11Kg. Zone mixer-amplifier with 6 x 40W class D power section for 100V or 4/8 Ohms speakers. Each zone can be monitored from the front panel via a headphone output with volume control. The 3 mic/line inputs- 1 aux input and an integral USB/SD/FM player with Bluetooth can be matrix switched to any of the 6 zones independently. Mic 1 channel has a variable override and each microphone input has switchable phantom power. A master chime with volume can be used for paging calls and alerts. This mixer-amp is designed for multi-room systems requiring different audio sources.. audio amplifier-100 volt line amplifier