Desigh a spider protector with LED light Ambiance Gain, bass boost,Adjustable Input Sensitivity. Low Level RCA Input. High Level Inputs. Thermal Protection Circuit, Short Protection Circuit.Overload Protection Circuit. Green Power/Red Protect LED. 10" 800w Slim Under-Seat Powered Subwoofer Car Audio, Amplifier built in,The Shell Made of cast aluminum, heat dissipation. Equiped with Amplifier Wiring Kit :Makes Wire Connections to Your Audio, Subwoofers and Speakers.Package with:10-inch subwoofer main unit,Car Amplifier Wiring Kit,RCA input/output cables,High to Low Level Converter,Volume controller. Supports High and Low Level Inputs & Remote Controller: Compatible with a variety of car stereo audio systems and car head unit equipment.Remote controller can control easy at driving. Product parameters:Frequency response:20HZ-150HZ,High frequency input sensitity:0.9V,LVR low input sentity:300mV ,Bass Boost:50HZ-150HZ, HPF High Pass Filter :0-12DB, Load: 20HZ ,Fuse Rating:20A. Power Green & Protect Red LED: If LED shows red, you need to maintain it first.