The difference is clear. The dual-microphone AudioIQ2 noise-cancelling technology of the Plantronics Voyager® PRO Bluetooth® headset, pushes the limits, by cutting up to 80% of background noise. It provides clearer calls for every day life, so if you are out and about, in the car or on the street, you will sound like you are in the office. The behind-the-ear wearing style provides a balanced, lightweight design for long call wearing comfort and with up to six hours talk time and audio battery recharge alerts, the Plantronics Voyager PRO headset really is the business tool you can rely on.