Amazon.com: FiiO E11 Portable Headphone Amplifier - E11: Electronics
Product Details Product Dimensions: 3.6 x 0.5 x 2.1 inches ; 2.2 ounces Shipping Weight: 5.6 ounces ASIN: B0053KWDES Item model number: E11 Average Customer Review: 4.1 out of 5 stars See all reviews ( 359 customer reviews ) Amazon Best Sellers Rank: #26,...