Lepai"s LP-269FS is an all-in-one mini amplifier that features an FM tuner, on-board MP3 decoder with SD/MMC and USB input, stereo RCA audio in with pass-through stereo RCA audio out, an IR remote control, as well as power output for four speakers. The built-in LCD display shows you the mode of operation as well as displaying time elapsed for MP3 files and the radio station tuning frequency. Front mounted treble, bass, and volume controls, as well as a four function EQ (accessible via the remote control), allow you to dial in the sound to match your taste and get the most out of your speakers. A wide input voltage range of 9 to 14.4 VDC allows the LP-269FS to be used in automotive or mobile applications. Included with the amplifier are: an IR remote control, power supply, and a 16" long FM antenna. Up to four speakers can be powered using the dual stereo output. Specifications: • 4 x 45W max (output power is dependent upon power supply) • Power requirements: 9 to 14.4 VDC, 5A • DC power input jack: 2.1 mm x 5.5 mm • Stable down to 2 ohms • Minimum THD: 80 dB • Frequency response: 20-20,000 Hz • Input impedance: 47k ohms • FM tuner frequencies: 87.5 to 108 MHz • FM receiver sensitivity: 16 dB • FM signal-to-noise ratio: 60 dB • Channel separation: 39 dB • Dimensions (including mounting flange): 7" W x 4-3/4" D x 1-3/4" H.