This compact and portable Bluetooth Pa speaker by Pyle provides wireless entertainment and gives you easy access to your music. It also has a digital audio recording mode which is perfect for rehearsals. You can also configure the echo, bass, and treble of your music to your desired levels for the ultimate entertainment experience. Sound system: 8 -inch subwoofer, 3 -inch tweeter, frequency response: 55Hz-20kHz, Sensitivity: 92dB (+/-2dB), impedance: 4 Ohm, S/N ratio: >80dB, T. H. D. : <1%, digital audio, File playback support: MP3, Wma, Wav, Usb/ Sd Memory, support: up to 32Gb, construction material: Engineered Abs, molded speaker cabinet, battery powered remote control, requires (1) x Cr-2025 , included, Battery powered microphone, requires (2) x Aa batteries, not included, Pa speak