The Sprint Cell Phone Signal Data Booster Magic Box Air Unity 544 4G LTE Working is a white wireless signal booster from Sprint. It includes a signal booster, power bank, and has a glossy finish. It provides full coverage with a remote antenna for indoor use. The item measures 13 inches in length, 9.75 inches in height, and 3.75 inches in width. It is designed for universal compatibility and is made of plastic.