Paladone Build A Boombox Speaker HERE COMES THE BOOM: A brilliantly fun and stylish retro amplifier. Amplify your music with this ingenious, non-electronic smartphone amplifier designed like a classic boombox. EASY TO USE: Place your smartphone in the compartment slot and hear the difference at once in your music with a great, portable, wireless solution to your party needs. PERFECT GIFT: This retro Build a Boombox Speaker is a tribute to a true trailblazing music revolution, and is a fun, unique gift for anyone who loves having a good time. CONTENTS: Contains all the components you need to create the perfect music amplifier, simply follow the included instructions to complete the internal sound amplifier. SPECIFICATIONS: Build a Boombox Speaker works with most smart phones. No batteries or wires required. Not suitable for children under the age of 36 months due to small pieces.