Plantronics Backbeat Pro Wireless Active Noise Cancelling Headphones with Mic – Black Type: Bluetooth Headset Noise Reduction: Controllable Active Noise Canceling (ANC) plus Digital Signal Processing (DSP) and dual microphones Ear Coupling: Over the Head Talk Time: Up to 24 hour(s) Standby Time: Up to 21 days standby time Up to 180 days in DeepSleep mode Charge Time: Up to 3 hours Operating Range: Up to 100 meters/330 feet from phone or tablet with Class 1 Bluetooth Bluetooth Version: Bluetooth v4.0 + EDR
