The Digital Innovations Acoustic Portable Speakers offer surprising volume and clarity from such a compact, ultra-portable package. These speakers work great with desktops, laptops, tablets, netbooks or any device with a 3.5mm audio output and attach magnetically to create a sleek, portable shell that is easy to pack and take with you anywhere. 4.8W of stereo sound provide crisp, clear treble and warm bass and the included battery pack provides power when a USB port is unavailable. Digital Innovations 4330300 Acoustix Portable Speaker System 2.0 USB Travel Speakers: Works with any device with a 3.5mm audio output Speakers attach magnetically to create a sleek, portable shell 4.8W of stereo sound Power Output: 2.4W per channel Frequency Response: 80Hz-18kHz Driver: 50mm Includes battery pack for backup power. Color: Black Number of Channels: 2 Age Group: ALL Features: 3.5mm Stereo Jack Condition: New Watts: 4.8 Watts Compatible Devices: for portable use Size: 50 mm Material: other-materials Manufacturer Part Number: 4330300 Contained Battery Type: Alkaline Connector Type: 1 x Aux Audio, 1 x USB 2.0 Model: 4330300 Brand: Digital Innovations Assembled Product Dimensions (L x W x H): 6.40 x 6.10 x 3.00 IN