Features: -Available in Black and Red colors. -Great for listening to your music with your baby while you are working out or just strolling around town or your neighborhood. -Battery type: 2 x AA Battery ( not included). -Connector: 3.5mm stereo Gold plated plug (L-Shaped). -Speaker diameter: 40 mm x 2 Speakers. -Operating time: Around 15 hours (by alkaline type).