The Arctic Butterfly 724 Super Brite is an extremely effective way of dry cleaning a DSLR sensor. A self-cleaning and charging brush, if removes dust from the sensor and includes twin built-in LED illuminators to make dust identification easier. The brush is made from filaments several timess thinner than a human hair, which are embedded with molecules which are permanently charged opposite to that of dust. When the brush is wiped across the sensor surface, the dust particles are 'sucked' into the brush. In the body is a motor which spins the brush. This charges the brush to ready it for use again, and to shake off collected dust. Requires 2 x AAA batteries (not supplied). Colour supplied will vary.