Fender SP-10 guitar amp. 22 system watts, probably 10 watts RMS. Gain switch (keep off for music!). Original paper cone, accordion surround driver (no bass at all) replaced with a new 6.5” poly cone, rubber surround woofer and 1.5” tweeter. Vastly improved sound quality, will work with keyboards and bass as well as guitar, and much better for music! Frequency range is (estimated) 70 Hz to 20 KHz. Lightening to 3.5mm to 1/4” cable included for phone audio. Plays LOUD! 11”H x 10”W x 6”D.