Everything can be your speaker with this X-Sticker White Vibration Speaker a revolutionary vibration system which makes a surprisingly great sound. Using the most advanced vibration technology it can be stuck onto any object turning it into a super speaker easily. Stick it on different objects such as boxes windows cups and more. The sound effect will vary when you stick it on different objects. Works with any audio device with a 3.5mm jack. Powered by USB or 2 ’AAA batteries (not included). Instruction manual extra cords and PU stickers included. Measures approximately 3.25″ × 1″ × 3.25″. Comes packaged in a hanging box. * Please note this product comes in a 4-Pack