EnrockMarine B500ABT-5 Audio Boat ATV Car Bluetooth Marine Waterproof Amplifire with 4 Speakers Elite Series Waterproof Bluetooth Amplifier, 400 Watt 4-Channel Amp, Built-in Bluetooth for Wireless Music Streaming Works with All of Your Favorite Devices (iPhone, Android, Smartphone, iPad, Tablet, etc.) Output Power: 100 Watt x 4 MAX, Amplifier Class: AB, Bluetooth Version: 2.1, Bluetooth Wireless Range: 25' Feet, Fuse Type: 20A, Input Gain Impedance Adjustment: 1 - 300mV, Frequency Response: 15Hz - 30kHz +/-3dB,Dimensions (L x W x H): 8.0" x 7.9" x 2.0" 2 Pair 200 -Watt 5.25" Inch Dual Cone Marine Waterproof Speaker System - Black