Small size than business cards; Includes high-quality in-ear stereo earphones that can be used as a FM antenna. *The color of the included earbuds can be divided into black and white depending on the color of the product. The bass enhancement (BBS) function reproduces powerful sounds. *BBS is an abbreviation for Bass Boost System. Enjoy AM broadcast with clear sound quality via FM frequency. This product will be shipped by Yu-Packet (Mail-bin). ●The product will be delivered in 2 to 3 business days from the date of delivery. ● Unlike mailing shipping, it is delivered by mailbox. Please be aware that we cannot accept requests for delivery on delivery, wrapping paper, or packaging.