The Cobra CBTH1, Deluxe Bluetooth(R) headset with T5 Sonance Noise Cancellation Technology is ideal for noisy environments . It utilises 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 dialling. Easy volume control provides other functions such as, placing calls on hold, transferring calls, and 3-way conference calls. This Deluxe headset features 8 hours of talk time, 250 hours of standby, and a 9.8m x 0m maximum operating distance. The home charger powers down, even when plugged in, to save power and help preserve the environment. Package contains USB charging cable, home charger, vehicle charger, extra ear cover, 2 extra microphone covers, User manual, and a 1-year warranty.