 The design of the 8525 is clean and uncluttered, with just a few buttons for mail, Internet Explorer, and contextual menus. Meanwhile, call answer and end buttons surround a five-way toggle that allows you to navigate and control the Windows Mobile interface. As mentioned, a full QWERTY keyboard cleverly slides out from underneath the screen. This allows you to hold the device horizontally, and the screen is automatically placed in landscape mode when you're using the keyboard. A side scroll wheel is conveniently tucked away on the side, making navigation when accessing the music player and other various applications a cinch when needed. A mini-SD memory expansion card slot is provided, as is an infrared port and support for a stereo Bluetooth headset. A mini-USB port is also included for wired data transfers and charging.