Shark 250 Watt 3 Channel Motorcycle Boat Snowmobile Audio System, Waterproof Stylish Speakers (Subwoofer Input), MP3 or Phone Input, Wired Remote, Model Shkr3090, Chrome QUALITY 250 WATT SYSTEM - Compact system perfect to tuck away on your ATV, Scooter, Jet Ski, Boat, Golf Cart or Motorcycle. Enough power to hear your music rolling down the road or cruising on the water. QUICK AND EASY INSTALLATION - Speakers include black brackets, speaker wiring, external marine grade antenna, wired, and wireless remote. SMALL POWERFUL AMP - This 250 Watt amp is small enough to tuck into your custom ride, yet packs the power to drive the 100 Watt Waterproof speakers to their FULL POWER. Working Voltage 10-16V DC. SPEAKER SPECS - VoiceCoil Impedance: 4, Resonance Frequency: 165HZ, Effective Frequency Range: Fo-12kHZ, Putout Sound Pressure Level: 88dB, Rated Input Power: 50W, Max Input Power: 100W, Distortion: Less than or equal to 5% FEATURES - 3.5mm AUX input, LCD Screen to show song or FM frequency, USB and SD input, FM radio, wired remote, and wireless remote with power and mute