PA Public Address Amplifier Receiver Compact Desktop Audio Source System Provides Convenient Microphone & Speaker Control Built-in Bluetooth for Wireless Audio Streaming Integrated Button-Activated Siren Alarm Function FM Radio with Digital LCD Display Connect & Stream Audio from External Devices MP3 Digital Audio File Playback Compatible USB Flash & SD Memory Card Readers USB Port Doubles as Device Charge Port RCA (L/R) Audio Inputs Aux (3.5mm) Input (2) 1/4'' -inch Mic Input Jacks (Mic1, Mic2) Speaker Output: 100V/70V/16 Ohm/8 Ohm/4 Ohm/COM Front Panel Button Control Center Audio Output Level LED Indicator Lights Independent Audio Channel Rotary Volume Adjustment Optional 12V DC Power Input Terminals PA Amplifier Remote Control FM Antenna