4-Channel Audio Amplifier Rugged & Durable Marine Grade Construction Water Resistant & Weatherproof Design Bluetooth Receiver for Wireless Music Streaming Ability USB Flash & SD Memory Card Readers MP3 Digital Audio File Compatibility LCD Digital Display Screen RCA (L/R) Audio Connectors Spring-Loaded Speaker Terminals Connect & Stream Audio from External Devices Heavy Duty Aluminum Alloy Heatsink Side Panel Button Control Center Volume, Bass, Treble Rotary Controls Built-in Thermal, Overload & Speaker Short Protection Includes Wall Power Adapter Power ON/OFF Switch Bluetooth Wireless Connectivity: Works with All of Today’s Latest Devices Laptops, Computers, Smartphones, Tablets, etc. Smart Auto Connect Pairing Ability Bluetooth Version: 2.1 Bluetooth Network Name: Pyle Wireless Range: 50’+ ft. Technical Specs: MAX Power: 400 Watt (100W x 4) Amplifier Type: Class-D Circuit Marine Grade Rating: IP-41 Impedance: 4 Ohm Frequency Response : 10 - 40kHz Channel Separation : > 65dB T.H.D.: <1.0% S/N Ratio: > 95dB Maximum USB Flash Support: 32 GB Digital Audio File Support: MP3, WMA, WAV Power: 110/220V (DC 12.5V Power Adapter) Dimensions (L x W x H): 11.0’’ x 8.6’’ x 2.1’’ Sold as: 1 Weight: 3.75 lbs. Pyle - PFMRA340BB - 2-Channel Amp: The full-range Amp lets you enjoy the powerful sounds that come from a sleek amp. The full-range wireless bluetooth audio receiver is the perfect solution for anyone seeking excellence on the open water. Capable of powering multiple sets of component, pro audio, or coaxial speakers, it packs the power that will allow your speakers to come alive.??