Pyle Model : PTA44BTBluetooth Home Audio Source AmplifierBluetooth Home Audio Amplifier, 4-Ch. Audio Source Stereo Receiver System with FM Radio, MP3/USB/SD/AUX Playback (500 Watt)Features:4-Channel Amplifier SystemBuilt-in Bluetooth for Wireless Audio StreamingFM Radio Tuner with Digital LCD DisplayFront Panel Button Control CenterAudio Source Input Mode SelectorConnect & Playback Audio from External DevicesHeadphone Jack with Independent Volume Control (2) 1/4'' Microphone Input JacksBuilt-in Microphone Talk-Over Function (MIC1 Only) MP3 Digital Audio File SupportUSB Flash Drive & SD Memory Card ReadersPush-Type Speaker ConnectorsAux (3.5mm) Input JackREC + Subwoofer Output RCA (L/R) ConnectorsAudio Input RCA (L/R) ConnectorsShort Circuit & Over Voltage ProtectionAudio Configuration Settings: Treble, Bass, Master Volume, Echo, Mic VolumeConvenient Audio Source Control for Home or Office Use Bluetooth Connectivity:Simple & Hassle-Free PairingInstant Wireless Audio Streaming AbilityWorks with All of Today’s Latest Bluetooth Devices (iPhone, Android, Smartphone, iPad Tablet PC etc.)Bluetooth Network Name: PYLEUSABluetooth Version: 4.0Wireless Range: Up to 40’+ ft. What’s in the Box:Audio AmplifierRemote ControlFM Antenna Technical Specs:Power Output: 500 Watt MAXAmplifier Design: 4-ChannelImpedance: 4-8 OhmsFrequency Response: 20Hz - 20KHzSignal to Noise Ratio: >81dBT.H.D.: <0.3%Headphone Jack, 3.5mmRadio Station Memory: 30 Station PresetsDigital File-type Compatibility: MP3, WMAMaximum USB/SD Flash Support: Up to 64GBRemote Control Battery: (1) x 3V Lithium Button Cell CR-2025 (Included)Power Cable Length: 4.2 ft.Power Supply: 110/220V, SwitchableDimensions (L x W x H): 13.0’’ x 9.84’’ x 3.54’’ –inches.