Output power 30W, 1/4" mic/XLR input, distortion control  Gain H/C. Mic volume control  Guitar volume control, bass and treble control for mic  Master volume control, bass-middle-treble/echo control for guitar  Headphone jack, foot switch jack, DC jack, built-in 12V 7AH rechargeable battery  VHF wireless guitar system  Frequency approved by USA FCC, European CE, R&TTE  Output voltage: RMS 4.5W x 2 (THD=10%)  S/N ratio: equal or more than 85dBA  Track L/R deviation: equal or less than 5dB