2.1 Bluetooth Marine Amplifier Receiver - Waterproof 4 Channel Wireless Bridgeable Audio Amp for Stereo Speaker with 400W Power Dual MOSFET Supply, GAIN Level & LED Indicator, Black - PLMRA410BT

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CHANNEL BRIDGEABLE AMPLIFIER: This 4-channel bridgeable marine amplifier delivers power to your speakers and is designed for universal use. It includes a bridge mode selection switch and a high or low electronic crossover network.
2.1 BLUETOOTH CONNECTIVITY: Equipped with 2.1 Bluetooth connectivity providing a wireless range exceeding 25 feet. Compatible with all Bluetooth devices such as iPhone, Android, iPad, and tablets. It contains a smart auto-connect function that retains device pairing information.
WATERPROOF & WEATHERPROOF: The audio amplifier is waterproof with a marine grade rating of IP 01. It is built with silver-plated stereo speaker output terminal connectors to withstand weather corrosion for extended use.
SHORT PROTECTION: Constructed with a heavy-duty Aluminum Alloy heatsink, thermal overload speaker short protection, and an LED indicator light. These components safeguard the amplifier and your vehicle's electrical system from short circuit conditions.
POWERFUL 400 WATT: This amplifier receiver offers robust performance with 400 WATT MAX power and a dual MOSFET power supply. It features dual adjustable input GAIN level controls for speakers with impedance between 4 to 8 Ohms