Specification Brand : NAPHYLAIFA BulletPoint1 : PRECISION BASS CONTROL - This amplifier bass control knob is designed to solve the issue of unsynchronized volume between your car stereo and subwoofer, delivering the ultimate music experience with perfect bass adjustment. BulletPoint2 : 4 PIN EXTENSION CABLE - The extra-long 3.5M/12FT cable allows you to connect the knob from your car trunk to the driver's seat, providing convenient control over your subwoofer's volume. BulletPoint3 : EASY INSTALLATION -Simply plug the 4-pin crystal connector into your subwoofer's audio interface and connect the other end to the bass control knob. The built-in power indicator shows the connection status for hassle-free setup. BulletPoint4 : HIGH-QUALITY MATERIALS - Featuring a pure copper core cable and high-quality insulated PVC protective coating, this bass control knob ensures durability and reliable performance. BulletPoint5 : AFTER-SALES SERVICE - If you encounter any issues such as missing parts or a non-functional indicator, contact us immediately for a replacement or solution.We stand by our products with a full quality guarantee. BulletPoint6 : [Safe & Efficient Protection] Our 4 in 1 retractable car charger has maximize device protection. compatible with iphone car charger/ compatible with samsung car charger/ android car charger offers over-voltage, under-voltage, over-current, over-temperature protection, and intelligent power allocation for safe, fast, and efficient charging. The cigarette lighter usb charger can device's battery from overcharge damage. BulletPoint7 : [Buy with Confidence]: Retractable Car Charger (2 Retractable Cables, 2 USB Ports), The HATALKIN Car Charger with highly trained Customer Service team will respond promptly within 24 hours to answer questions and resolve any problems you may have with the HATALKIN retractable car charger. Note: This car charger is only for charging. Collection : 2022 Color : Black CompatibilityOptions : Universal CompatibleDevices : Audio CompatiblePhoneModels : iPhone 5, 6, 7, 8, 9, 10, 11, Samsung Galaxy S20, S21, S22, Note 20, Pixel 3, 4, 6 CompatibleWithVehicleType : 自行车 ConnectivityTechnology : USB ConnectorGender : Male-to-Female ConnectorType : 4 Pin ControllerType : Button Control ControlMethod : touch CoolingMethod : Water CustomerPackageType : Standard ElectricFanDesign : window_fan ExternallyAssignedProductIdentifier : 4772440048848 ExternallyAssignedProductIdentifier1 : 680580368136 ExternallyAssignedProductIdentifier2 : 0680580368136 FinishType : Matte or Smooth FormFactor : cigarette lighter adapter IncludedComponents : 1*12FT 4-PIN CABLE & 1*Bass Control knob for Car Amplifier IndoorOutdoorUsage : outdoor InputVoltage : 24 volts IsCordless : 1 ItemName : NAPHYLAIFA Universal Bass Knob Control for Car Amplifier, Bass Volume Knob with 4-Pin Extension Cable. ItemPackageDimensions_Height : 21.6916 centimeters ItemPackageDimensions_Length : 2.6924 centimeters ItemPackageDimensions_Width : 19.812 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : vehicle-amplifier-stereo-patch-cables Manufacturer : NAPHYLAIFA Material : Aluminum Material1 : Acrylonitrile Butadiene Styrene Material2 : Polycarbonate Material3 : Aluminum MaximumRotationalSpeed : 1500 rpm MaximumWeightRecommendation : 2500 grams ModelName : bass control knob for amplifier-3.5M ModelNumber : 12V Car Air Condition MountingType : Bar Mount NoiseLevel : 35 decibels NumberOfBlades : 6 NumberOfBoxes : 1 NumberOfItems : 1 NumberOfPins : 4 NumberOfPowerLevels : 1 NumberOfSpeeds : 2 OutputVoltage : 5 volts_of_direct_current PartNumber : 1 Pattern : Solid PowerPlugType : type_c_2pin_eu PowerSourceType : cigarette lighter adapter ProductDescription : Take control of your car's bass like never before with our Bass Control Knob for Car Amplifier. Designed to synchronize the volume between your car stereo and subwoofer, this remote volume controller ensures your music sounds perfect every time.