Features: Large-capacity capacitor filter, the voltage is more stable to enhance anti-jamming capability . Perfect sound quality with no noise, small distortion,powerful shocking and bass. It can play TF card, U disk, MP3 format music, external audio sourc. With built-in short circuit protection design, it features with better stability and compatibility. Remote control: full function, with number key it can directly control. Self-equipped with switch. It fits for all vehicle. Descriptions: High-quality power, speaker tweeter Audio dynamic output, treble output Bluetooth phone calls answer Specification: Color: black Bluetooth version: 2.1+EDR Codec:SBC Voltage: 220 V Maximum power: 50W Impedance: 4 (Ω) Loudspeaker unit: 133(mm) Sensitivity: 200 hv Frequency response range: 20-20000 Size: 117*45*65mm Package included: 1 x Car Bluetooth Amplifier 1 x Remote control 1 x AC power line 1 x DC power line 1 x Speaker connecting line Notes: Please allow 0-2mm error due to manual measurement, thanks for understanding. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand, thank you!