The Pyle PFMRA440BB 4 Channel Class D marine amplifier is rugged, durable with a weatherproof design. Connect your speakers or subwoofer at a maximium power output of 400 Watts at 4 Ohms. Bluetooth connectivity for wireless music streaming.  Additional features Spring-Loaded Speaker Terminals, Volume, Bass, Treble Rotary Controls, Connect ; Stream Audio from External Devices using RCA inputs. 

General Features:

• MAX Power: 400 Watt (100W x 4)
• Amplifier Type: Class-D Circuit
• Marine Grade Rating: IP-41
• Impedance: 4 Ohm
• Frequency Response : 10 - 40kHz
• 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
• 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.