The key features
Clips to any book for readingSmall and lightweight design3 different brightness settingsFlexible neck for best light positionComes with AAA battery

The blurb

A handy clip-on reading light, small and lightweight enough to slip inside your bag or pocket. Carry on reading anywhere, even when the sun goes down. Perfectly travel practical for a relaxing holiday or simply on the commute home. And it takes a standard AAA battery - easy to find and change wherever you are! The Really Serious Book Light Range is a co-ordinated collection of reading lights designed to suit the needs of all kinds of book light users.