3900 WATT MAX POWER OUTPUT: The 3900 watt 1 channel high power car audio mono amplifier has a subsonic filter, perfect for your car stereo entertainment system. It also has 180 amps for the current draw at full power for your average music program IDEAL FOR CAR AUDIO ENTERTAINMENT: Featuring our car audio mono amplifier that pursue excellence with crispy and loud sound, this car amp gives you that ideal entertainment system, perfect for car rides and long rides with friends and families MOUNTING HARDWARE FOR EASY INSTALLATION: The car audio mono amp comes with the required complete set of mounting hardware to ensure an easy installation for its users. The amp also have indicators: power on (green), low batt (red), clip short (blue) SHORT CIRCUIT PROTECTION: This 1-ch car amp is equipped with a recommended fuse of 150 Amps to protect the amplifier and the electrical system of your car from thermal/overload / short circuit conditions. Keeps your car and the audioamp safe SLIM SIZE DESIGN: Measuring L 9.77'' x W 8.4'' x H 2.2'' - inches this box amp's small size makes installation a breeze, you'll have no trouble finding a spot for this little yet powerful device. Also equipped w/ cooling fans to prevent overheating.