1. In addition to the main volume / treble / bass controls, there is also a specially designed bass volume control for easy enjoyment of high-quality music.2. Bass & Treble & Volume Adjustment: Power switch button with clear response and rotary knob control for main volume adjustment. It can be adjusted according to your needs.3. Compact size: Complete design and exquisite appearance, silver shell looks stylish and durable, unique structural design is easy to install on cars/ships, saves space and is easy to operate.4. Application range: DC 12V input is suitable for many scenes, can be used in your car, your boat, your RV, your golf cart, your home, anywhere you need a great amplifier, low distortion and acoustic accurate music reproduction.Name: Car AudioNumber of channels: 2.1Power amplifier type: HIFI power amplifierAudio input: Stereo L/R RCA / 3.5mm AUXAudio output: wire control speaker jack + subwooferBluetooth-compatible: not supportedInput voltage: DC 12V/2AEffective power: 20WX2+40WMaximum power: 200W+200WChannels: 2.1 power amplifier, can connect 2 speakers and a subwooferSpeaker impedance: 4-8ohm;Frequency response: 20Hz-20KHzDistortion: 0.004Signal to noise ratio: 80dBResolution: 47KWorking voltage: DC 12VDimensions (L x W x H): 150 x 92 x 34mm / 5.91 x 3.62 x 1.34inDifferent batches may have different factory appearance labels, which will not affect the useColour:silverMaterial:MetalPackage Contents:1 x Car Stereo Amplifier SpeakerOnly the above package content, other products are not included.Note: Light reflection 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.