- br 3M MP225 Mobile Projector For iPhone iPad and iPod - Review Best Pricebr br Technical Detailsbr Up to 2 hours of battery life per charge (or runs continuously on AC power)br Projects a screen size of up to 80? diagonallybr Compatible with iPhone, iPod, iPad, iPad 2, laptops and gaming devices (additional cable(s) sold separately)br 32 lumens of brightnessbr Audio out for external speakers or headphones