The Logitech Tablet Speaker for iPad simply clips on to your tablet so you can enjoy enhanced audio! Get more out of your tablet The speakers have a rubber clip that attaches the speaker to your iPad. The 3.5mm audio cable plugs into the headphone socket & youve got sound! You can charge the speakers via USB (Universal Serial Bus) so you never have to worry about batteries, & you can listen to your speakers for up to 8 hours if you want to take it out & about! The compact Logitech Tablet Speaker for iPad comes with a travel case so you can take it wherever you go.