The GXBT180 is the baby brother to the BT280 but as is so often with the younger sibling, it is better looking, more fun and fits easier into a rucksack, measuring up at 86 x 86 x 110mm it is super compact and only weighs 340g, you can even put it in your pocket (jacket, not jeans). It comes in three colours: Red, Black and Blue just like its older sibling as well as that same, handy attachment loop for fixing it to your bag, bike, tent, whatever you like.