Alumuinum Body:The Shell is made of cast aluminum which shows heat dissipation. Equiped with Car Amplifier Wiring Kit :Makes Wire Connections to Radio, Subwoofers and Speakers. Colorful lighting Ambiance:Operated by mobile app to change colors,you can choose any colors you like, make the night and experience more cool and exciting .Such as gradient color jumping, following the rhythm of the music jumping and so on. Supports High and Low level RCA inputs:Compatible with a variety of car stereo audio systems and car head unit equipment.The Car Subwoofer supports low level RCA inputs & compatible with high level inputs, adjustable input sensitivity. Product Parameters:High frequency input sensitity:0.9V, Frequency response:20HZ-150HZ,LVR low input sentity:300mV ,Load: 20HZ ,Fuse Rating:20A ,Bass Boost:50HZ-150HZ, HPF High Pass Filter :0-12DB,Signal to Noise Ratio: >90dB. Multi-Protection: short circuit protection circuitry, thermal protection circuitry,overload protection circuitry, green power/red protection LED:If LED shows red, you need to maintain it first.