Customized senior shielding inductor approved by audiophiles in popular forums, improving the most important LC filtration procedure for digital amplifiersThe Bluetooth Hi-Fi wireless connection uses top British CSR 4.0 Bluetooth module, ensuring high-quality audio transmissionWith FM function, you can listen to the music any time and any whereCompatible with car, motorcycle, Mp3, computer speaker and other audio applicationsAUX high fidelity audio frequency inputs and easily connects to an extensive audio-visual product of CD / DVD / PC etc.Real 2RMS x 20W stereo circuit designBuilt-in circuit for speaker protection and start delay, ensuring that there is no impact sounds upon shutdown / start up and that your valuable speaker would be well protected ( speaker be included in the circuit 3 seconds after start up ) Name:Model Number:-502SInput power: DC 12VSpeaker impedance: 4 - 8ohmsFrequency response: 20Hz - 20KHzTotal harmonic distortion: more than 0.05 percentSound track: 2: 85dBDesign: Car,Fun,Mini,Multifunctional,PortableCompatible with: MP3Supports: Bluetooth,FM,Remote Control,SD Card Music PlayingFunctions: AUX Function,Noise Cancelling,Songs Track,StereoConnection: Wired,WirelessInterface: 3.5mm Audio,Power Charge Port,SD Card Slot,USB2.0Audio Source: Bluetooth Enabled Devices,Electronic Products with 3.5mm Plug,Electronic Products with USB port,SD cardMaterial: Aluminum AlloyColor: RedProduct size (L x W x H): 15.50 x 10.50 x 4.50 cm / 6.1 x 4.13 x 1.77 inchesPackage Contents: 1 * Amplifier1 * Remote Controller1 * English User ManualOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.