Introducing our new 'Forever Cartridge' for the Acne Clearing Blue Light Device. This replaces the formerly known 'Skin Perfecting Cartridge', but with one key new feature; this new cartridge will ensure your blue light device works all the time when fully charged. Eliminating the need to replace after approximately 50 treatments. This is a one-time only purchase. The device gets it's professional-strength power from the patented technology of the 'Forever Cartridge'. Receive a steady supply of non-UK therapeutic blue light treatment with this Forever Cartridge.