Acer P1257i DLP XGA Projector (MR.JUR11.001) - Native Resolution: 1024 x 768, Standard Mode Brightness: 4,500 lm, Native Aspect Ratio: 4: 3, Contrast Ratio: 20,000: 1, Number of Speakers: 1, Speaker Output Power: 10 watts, Interfaces / Ports: USB, Composite Video, Number of VGA Inputs: 1, VGA In, Number of VGA Outputs: 1, VGA Out, Number Of Audio Inputs: 1, Number Of Audio Outputs: 1, Audio Line In, Audio Line Out