all faulty remotes and free replacements. iAUDIO U2 The iAUDIO U2 was introduced in July 2004. It was also Cowon's first player to feature a navigational joystick instead of the 2 rockers found on most previous releases. The U2 used the STMP 3520 chipset by Sigmatel. It comes in the colours of Ruby Red (256MB of memory), Ocean Blue (512MB of memory), and Black (2GB of memory). The iAudio U2 has rounded corners and delicately woven silver ring ringing the five-way navigational button. The U2 is smaller and lighter than the iAudio 4, measuring at 2.9x1.0x0.7 inches and weighing 1.2 ounces, and features a 128x64-pixel display. The U2's built-in lithium-polymer battery lasted 15 hours. The USB 2.0 transfer rate is at 1.86MB per second. iAUDIO G3 and G2 The iAUDIO G3 was introduced November 2004. The internal hardware was very similar to that of the iAUDIO U2. Both players used the same Sigmatel chipset. The only difference between the two players was that the G3 was powered by an AA battery, allowing a playing time of up to 50 hours. The iAUDIO G2 was a cheaper version of the G3 which was introduced in the spring of 2005. It lacked some of the main features of the G3: no FM radio, the interface was only USB 1.1 (compared to USB 2.0 on the G3), and the playback time with a single AA battery was down to 40 hours. iAUDIO 5 The iAUDIO 5 was introduced in November 2004. It was the successor to the popular iAUDIO 4 series and was powered by the same Sigmatel chipset that were used in the iAUDIO U2 and G3. The iAUDIO 5 was relatively similar to the aforementioned players. What set it apart from other players was the fact that it had 1000 different backlight colour combinations. It was powered by an AAA battery which allowed for a maximum playback time of up to 20 hours.The device's colour is determined by the memory size; the 256MB model has red accents, the 512MB model has blue accents, and the 1GB and 2GB units have black accents. It has a size of 3 by 1.4 by 0.7 inches and weighs around 1 ounce. iAUDIO X5 The iAUDIO X5 was released in April 2005. The X5 uses much of the same hardware as the M3, and as such has much of the same features and capabilities. It