These lights come in a box with 2 light reels of 5 metres each in length so makes 10 metres in total. There is a choice from 20 different colours or u can combine colours and settings to get the mood & atmosphere u'd like whether it be chilled out or party vibe. The brightness levels are adjustable & there are lots of different lighting modes to choose from. It is all controlled by the remote control so u dont need to get up to adjust the settings or colour. It plugs in to the mains power with a 12v plug. This set is waterproof so the strips could be used outdoors in the garden to light up areas which looks great at night. They look cool around your furniture indoors or under cupboards or around your television or computer.