The Callaway Golf FT Tunes Smart Phone Portable Speaker System & Sunglass Case features:

• Compact, portable, battery-powered stereo sound system for your smart phone or MP3 player.
• Sturdy, zippered case keeps your smartphone or MP3 player and eyewear safe.
• Sound Output: 80+ 3dB, Distortion: less than 5%, Speakers: 40mm x 2 provide a crisp clear sound.
• Requires two AA batteries with approximate run-time of 15 hours.
• Maximum dimensions of smartphone/MP3 device cannot exceed 5.44″ X 2.64″ for zippered closure of case.
• AA batteries, smartphone / MP3 player, and sunglasses shown must be purchased separately.