The Sony Ericsson HBH-DS205 is a stereo Bluetooth headset that is designed for handling both music and calls wirelessly from a Bluetooth-enabled device. The headset features digital signal processing technology for clear sound transmission and utilizes adaptive frequency hopping technology to reduce wireless interference. It is an upgrade to the HBH-DS200 since it has an enhanced data rate which provides faster transmission, higher bandwidth, and lower power consumption. It also features auto-pairing as well as automatic volume adjustment which keeps the volume loud in noisy environments.