Sony's DR-BT101 headphones are a mid-range set that focuses on being lightweight and convenient. They are cordless and use Bluetooth technology to communicate with compatible music players or mobile phones, and include a built-in microphone with noise suppressing and echo canceling, which enhance call clarity. The headphones also have built-in controls (play, pause, skip) that work with compatible media devices. The DR-BT101 set charges via a USB cable. The speakers use 30mm cup drivers, and achieve a frequency response range of 14 - 24000 Hz. A fully charged battery yields about 11 hours of continuous music playback, though it can last as long as 100 hours in standby or communication (cell phone) mode.
