3M MP300 Mobile Projector Palm-sized, plug n play projector with built-in speaker and audio out for external speakers or headphones Simple plug n play interface to mirror tablets, laptops, and smartphones (adapter sold separately) Bright enough for a variety of settings -60 Lumens (not designed for brightly lit environments) Up to 3.5 hours of battery life per charge (or runs continuously on AC power). Turn the unit on by pressing the power button for 3-9 seconds before attempting to charge the unit for the first time. Remote control and HDMI cord included