This is one of those products which makes you think why did nobody think of this beforeit can sometimes be difficult to see where the edges of the sensor are let alone the dust on it resulting in an awkward juggling of torch and swab well no more not only is the swab light a handy bright source of illumination but it also features a slot for the swab turning into a swab handle so you can both get a good grip on the swab and see whats being cleaned