Insten SportBand with Case for MP3/Cell Phones (Black) Compatible With: Apple: iPhone 1st Gen. 16GB/4GB/8GB, iPhone 3G 16GB/8GB, iPhone 3GS 16GB/32GB, iPod 3rd Gen. 10GB/15GB/20GB/30GB/40GB, iPod 4th Gen. 20GB/20GB (Color Display)/30GB (Color Display)/40GB/40GB (Photo)/60GB (Color Display)/60GB (Photo) Exercise your right to a great soundtrack with this ultimate workout duo: MP3/Cell Phones Sport Band with Case. This durable, lightweight armband case keeps your MP3/Cell Phones secure and protected. Adjustable Velcro Armband gives you the versatility of carrying your MP3/Cell Phones in a variety of ways. Unique double-folding strap can fit snugly on the smallest and largest of arms! You can run, ride, lift and more without missing a second of your favorite tunes. Armband is compatible with upper arm circumference: 9 - 13 inches. Pocket Size: 2.75W x.75D x 4.5H in. (7W x 2D x 11.5H cm)