A-Rival iPhone Beamer Scotty. Projector brightness: 15 ANSI lumens, Projection technology: 3LCD, Projector native resolution: nHD (640x360). Service life of lamp: 20000 h, Lamp type: LED. Focus: Manual. Power source: Battery. Battery technology: Lithium, Battery capacity: 2100 mAh, Battery life (max): 2.5 h