Development work on the design of the iPod nano started only nine months before its launch date.[3] The nano was launched in two colors (black and white) with two available sizes: 2 GB (roughly 500 songs) for US$199 and 4 GB (1000 songs) for US$249.[1] On February 7, 2006, Apple updated the lineup with the 1 GB model (240 songs) sold at US$149.[4] Apple also released some accessories, including armbands and silicone "tubes" designed to bring color to the nano and protect it from scratches, as well as a combination lanyard-earphone accessory that hangs around the neck, and avoids the problem of tangling earphone cords.