Hikvision DS-QAE0A240G1-VB6 240W 6-Zone Analog Amplifier The device has 2 auxiliary (AUX) line

240W 6-Zone Analog Amplifier The device has 2 auxiliary (AUX) line inputs, 1 emergency (EMC) input, and 2 microphone inputs; 1 auxiliary output, Built in Bluetooth/MP3 function module for content playback on the phone. 5. Mic 1 and emergency line EMC inputs have the highest priority level, while Mic 1 and EMC have mixed outputs that can strongly cut other audio