Batman appreciates utility. Just look at that insanely useful belt of his...he has a tool for everything! I once saw him tranquilize an 8 year old at an R-Rated movie because his parents wouldn't reign him in. GET YOUR KIDS UNDER CONTROL, PEOPLE! At least that's how the Dark Knight feels about that sort of thing. Tangent aside, the Batman Symbol Ladies Wallet w/Speaker requires 2 triple A batteries and has plenty of sleeves and places for all of your cards and 'moneys'. Compatible with any of those crazy smart phones or I-Products with a headphone jack, you can now share your music as long as you have your hinged wallet with you! Made from 100% man-made materials...hey, that's what they have on the inset!