Featuring active noise reduction with DSP (Digital Signal Processing) for maximum audio clarity even in loud environments, an ear hook stabilizer for comfort and stability, and a set of soft-gel ear tips in three different sizes for optimal fit, this headset is designed to deliver the highest communication quality. And with support for 128-bit encryption, it also helps to ensure your communications are secure. Comfort and convenience combined. With its sleek, contoured design, the headset weighs just a third of an ounce (9g) and comes with a lithium ion battery that can hold enough charge for 3 solid hours of talk time, or up to 80 hours (more than 3 days) on standby. The carrying pocket clips onto your BlackBerry holster or pouch and contains a USB charging chip. That way, when you charge your device in any BlackBerry device charger, you'll charge the headset at the same time. Enjoy a range radius of up to 33 feet (10 metres) with controls for volume, mute, redial and voice-activated dialing. The carrying pocket even vibrates for incoming calls. This headset supports Bluetooth® 2.0 and is compatible with any Bluetooth-enabled device, but is optimized for your BlackBerry smartphone