Pyle Home PD750A Professional PA Amplifier with Built-In DVD/CD/MP3/USB/70-Volt output (Certified Refurbished) This Certified Refurbished product is tested & certified by PYLE-HOME to look and work like-new. The product includes all original accessories, and is backed by a 90-days warranty. With USB Port, DVD Player (Anti-Shock) Compatibility with DVD/CD/CD-R/CD-RW/MP3 Output Regulation: Less than 2dB no Load to Full Load Speaker Output: 4 Ohm(20V) 8 Ohm(28.3V) 16 Ohm(40V) 70V Line Out: 1V0.3V