The Cobra CBTH1- Plus, Deluxe Bluetooth(R) headset with T5 Sonance Noise Cancellation Technology is ideal for noisy environments . It utilizes Bluetooth version 2.0, which ensures faster communication speed between the Bluetooth device and the cellular phone. Developed with superior quality material, the over-the-head style headset has a light-weight design, optional wear of both ears, and adjustable boom arm microphone that provides comfort for any user. The T5 Sonance Technology electronically filters noise and simultaneously amplifies voice for unparalleled sound quality. The simple one-touch button creates the ability for answer/end control, redialing, and voice dialing. Easy volume control provides other functions such as, placing calls on hold, transferring calls, and 3-way conference calls. Additionally, this unit has multi-point technology which allows teh headset to be paired with up to two Bluetooth enabled devices at the same time. This Deluxe headset features 20 hours of talk time, 400 hours of standby, and a 32 foot maximum operating distance. Best of all, the home charger powers down, even when plugged in, to save power and help preserve the environment. Package contains USB charging cable, vehicle charger, extra ear cover, extra microphone cover, User manual, and a 1-year warranty.