2000W Bluetooth Amplifier Powered Stereo Karaoke 4ohm DJ 2 MIC FM Radio MP3 Disk. Rated voltage: 220V-240V DC12V – RMS: 500W+500W – MAX Power: 1000W+1000W – Type of power amplifier: AV power amplifier – Bluetooth Version: 4.0 – Vocal tract: 2 vocal tracts – Load resistance: 4 -16 ohm – Input sensitivity: 100mV – Input resistance: 47K Omega – S/N: >80dB – Purpose. Bass regulation: +-12dB (100Hz) – Soprano regulation: +-12dB (100Hz). Microphone output sensitivity: >10mV. Power off memory playing – Switch machine horn protection function – Short circuit protection function – Overload protection function – Insert card in U disk playback – FM audio and playback function – Support: plug in U disk, audio input DVD/VCD/CD/MP3/ computer, etc. 1 x Amplifier – 1 x Remote Control – 1 x User Manual. Usually it cost about 35USD-50USD. Thanks for your understanding. If you receive defective item, please kindly notify us within 14 days.