X-Sticker Pink Vibration Speaker (Available in a pack of 4) Comes packaged in a hanging box. Powered by USB or 2 'AAA' batteries. The sound effect will vary when you stick it on different objects. Instruction manual, extra cords and PU stickers included. Works with any audio device with a 3.5mm jack. Weight: 0.62 lbs. Sold as 4 pack.