Features The Evolve 75 is a wireless headset with superior Active Noise Cancellation and integrated busylight to enhance your productivity. Dual connectivity to two Bluetooth devices allows you to take calls and listen to music from the same headset, giving you extra freedom to move 100ft/30m away from your smartphone and/or PC. Outstanding sound for calls and music HD voice for your calls and world class speakers for music. Reduce noise and interruptions Superior ANC and integrated busylight acting as a do not disturb signal. More freedom Dual Bluetooth connectivity to two devices at the same time for calls and music, with the flexibility to move up to 100feet/30 meters away from your connected device. Specifications Headset weight - 177 g Talk time - Up to 15 hours Battery time (with ANC activated) - Up to 30 hours Charging time - 2.5 hours Active noise cancellation - Hybrid 4 mic ensuring 17dB (perceived cancellation in an office environment) Listen-in feature - Press the right ear cup to hear the outside world without having to take off your headset Connection - Bluetooth or USB. Allow for dual connectivity for two Bluetooth devices simultaneously Bluetooth - Class 1 (up to 30 meters / 100 feet) and Bluetooth 4.2 Warranty - 2 years What's in the Box? Evolve 75 headset Jabra Link 370 USB adapter Protective travel case USB cord (allowing for use while charging) Quick Start Guide