This cute black Scottie 2 1/2" x 2" x 1/2" speaker is compatible with any device with a standard 3.5 mm head phone socket, such as:MP3 players, PDA, portable gaming systems, cell phones and computers. It requires a USB port for charging. Package includes a 3.5 mm stereo plug and USB connection plus instructions for charging. The play time is 4 hours. Warning: This is not a toy and not for children under 12 years. Was $24 - Special Price $12. ( 2 speakers available)