Miroir HD Projector MP150A, LED LAMP, with Built in Rechargeable Battery, 720p and HDMI Input Texas Instrument's DLP IntelliBright Technology 1280 by 720 (720p) native resolution Auto vertical keystone adjustment +/- 40 degrees Built in li-polymer battery for approximately two hours of projecting time Two built-in 1-watt speakers; audio out jack (3.5mm)