.Installation Mixing Amplifier 65W @ 4 Ohms / 100 V / 70 V Line input for emergency signal with contact closure 2 microphone/line input sockets with microphone/line switch and switchable 24 V phantom power Switchable chime feature in Mic/Line 1 channel 2 line inputs with RCA sockets and Bluetooth 4.0 interface (mono summed) 35W Class-D Amplifier with Lo-Z / Hi-Z selector switch and 4 Ohm / 100V / 70V outputs Balanced AUX line output with Music-Mix switch, for controlling external amplifiers, active subwoofers or music-on-hold systems 4 priority levels for comprehensive integration options Switchable auto standby mode for reduction of energy consumption Intuitive control panel design for operation with capacitive controls for selecting music source and Bluetooth pairing Universal wide-range switching power supply