Presentations with a projector have lost nothing of their original attractiveness when the aim is to captivate participants of an auditorium with high-resolution pictures. The QPT-231 is a portable projector with a design that lends projector presentations a new quality of ease and lightness. Showcasing a highly compact design, this projector is extraordinarily light with a weight of only 250 grams. The miniaturisation of this projector is complemented by a plain yet highly elegant design language that lends this type of device a new appeal. The innovative use of an aluminium alloy helps reduce thermal and noise problems, both of which are common among these kinds of devices. The concept of how this projector is operated is also highly user-friendly: the power key is activated comfortably with a quick touch; all user functions are integrated in the keypad area. Great user flexibility is given by the possibility to power the projector independently with a battery when electric connection is unavailable. This battery is detachable for recharge, provides up to 3.5 hours of use, and delivers a brightness of 100 lumens and a projecting range of 50 inches at the maximum. The QPT-231 also features a variety of different connections for easy implementation in contemporary multimedia applications.