Pyle Model : PTA44BT Bluetooth Home Audio Source Amplifier Bluetooth Home Audio Amplifier, 4-Ch. Audio Source Stereo Receiver System with FM Radio, MP3/USB/SD/AUX Playback (500 Watt) Features: 4-Channel Amplifier System Built-in Bluetooth for Wireless Audio Streaming FM Radio Tuner with Digital LCD Display Front Panel Button Control Center Audio Source Input Mode Selector Connect & Playback Audio from External Devices Headphone Jack with Independent Volume Control (2) 1/4'' Microphone Input Jacks Built-in Microphone Talk-Over Function (MIC1 Only) MP3 Digital Audio File Support USB Flash Drive & SD Memory Card Readers Push-Type Speaker Connectors Aux (3.5mm) Input Jack REC + Subwoofer Output RCA (L/R) Connectors Audio Input RCA (L/R) Connectors Short Circuit & Over Voltage Protection Audio Configuration Settings: Treble, Bass, Master Volume, Echo, Mic Volume Convenient Audio Source Control for Home or Office Use Bluetooth Connectivity: Simple & Hassle-Free Pairing Instant Wireless Audio Streaming Ability Works with All of Today’s Latest Bluetooth Devices (iPhone, Android, Smartphone, iPad Tablet PC etc.) Bluetooth Network Name: PYLEUSA Bluetooth Version: 4.0 Wireless Range: Up to 40’+ ft. What’s in the Box: Audio Amplifier Remote Control FM Antenna Technical Specs: Power Output: 500 Watt MAX Amplifier Design: 4-Channel Impedance: 4-8 Ohms Frequency Response: 20Hz - 20KHz Signal to Noise Ratio: >81dB T.H.D.: <0.3% Headphone Jack, 3.5mm Radio Station Memory: 30 Station Presets Digital File-type Compatibility: MP3, WMA Maximum USB/SD Flash Support: Up to 64GB Remote Control Battery: (1) x 3V Lithium Button Cell CR-2025 (Included) Power Cable Length: 4.2 ft. Power Supply: 110/220V, Switchable Dimensions (L x W x H): 13.0’’ x 9.84’’ x 3.54’’ –inches.