Voltage: DC 12 V. High level input sensitivity: 1V. Low level input sensitivity: 300mV. Low pass filter: 50 hz-150 Hz. Bass boost: 0to + 12dB. High pass wave generator: 20Hz. Dimension: 35267cm / 13.7810.242.8inch. The external configuration of high strength stainless steel horn protection net cover. Alloy fuselage to reduce the noise caused by the vibration. 2.8 inch 800W high power design, with the volume controller. Low frequency ability of the bass horn, high quality low tone output. Fine workmanship and good performance. Easy to install, can be installed directly under the driver’s seat. 1pc 4m Positive Power Cord (Red). 1pc 0.4m Negative Cable (Black). 1pc 4m Audio Cable (Blue). 1pc 4m Control Cable (Dark Blue). We provide clear pictures, measurements where possible. Please check as much as possible to make sure the item is the one that you need. Please allow 0.5-1 inch difference due to manual measurement. The instruction is not included in the package. Professional installation is Highly Recommended. If item is defective after 3 months, you can still send it back to us.