Sennheiser http://www.sennheiserusa.com has introduced a new addition to its new class of wireless headphones. The PX 210 BT portable mini headphone is equipped with Bluetooth and new apt-X coding technology.

The PX 210 BT has a transmission range of up to 33 feet, which means your audio source can be stored in a backpack or bag when you're out and about. Audio controls are located directly on the earpiece. They can be used to activate or deactivate the Bluetooth function, regulate the volume and navigate a playlist. The rechargeable lithium polymer battery provides up to 12 hours of non-stop listening.

The PX 210 BT has neodymium magnets that ensure a natural and lifelike sound image with a frequency response of 15 to 22,000 Hertz, according to Maurice Quarré, head of product management for consumer electronics at Sennheiser. The company's patented Duofol diaphragms almost entirely eliminate standing waves to reproduce brilliant highs and fast, tight low end with impeccable clarity, he adds.

The PXC 210 BT can be connected to all Bluetooth-compatible audio sources (listen-only). Sennheiser Bluetooth dongles (sold separately) ensure compatibility with devices that don't support apt-X technology, or that lack Bluetooth audio altogether.

The PX 210 BT weighs just under four ounces and comes with small, soft ear cushions. It has a folding mechanism and a carrying case. The PX 210 BT is available now. The set includes a lithium polymer rechargeable battery, a battery charger with adapters for use in different countries, and an audio cable for traditional listening. It has a manufacturer's suggested retail price of US$299.95.