Audiobox TRK-5300BLK Retro Ride 10-Watt-RMS Bluetooth Rechargeable Truck Speaker with FM Radio (Black) • 10-watt-RMS output power;• 1950s retro truck speaker with modern playback options;• Bluetooth(R) wireless streaming; WaveSync(TM) technology allows pairing of second truck (sold separately) for double the playback volume of any Bluetooth(R)-streamed audio;• Frequency response: 20 Hz to 20 kHz;• FM radio, USB and TF/microSD(TM) Card inputs for MP3 playback, and 3.5 mm aux input for non-Bluetooth(R) devices;• Rechargeable battery with up to 4 hours of operational time before needing to be recharged; takes approximately 4 hours to recharge;• Includes charging cable;• Black;