Jawbone Prime Bluetooth Headset with Noise Assassin Technology, Black [Bulk Packaging] Latest in NoiseAssassin technology delivers improved noise elimination performance and an integrated digital approach to wind reduction Echo cancellation and wind noise reduction Up to 4.5 hours of talk time, up to 216 hours (9 days) of standby time Bulk Pack includes Bluetooth, Ear-Hook, Ear-Gel and Quick Start Guide Multipoint support for simultaneous connection to two audio sources, including a PC