Jabra 6640-906-105 Motion Uc+, Blueth W/Travel Ki 6640-906-105 Ear Coupling: Over the Ear Talk Time: Up to 7 hours (5.5 hours with Busylight on) Standby Time: Up to 15 days Charge Time: Approximately 2 hours Operating Range: 300 Feet Bluetooth Version: 4.0 Bluetooth Profile: Bluetooth Profiles A2DP v1.6 Hands free profile v1.6 Headset profile v1.2 Specifications: Connectivity Paired Devices Up to 8 stored devices Up to 2 simultaneously connected devices Unified Communication Yes Operating System Mac / Windows Connectivity USB Speakers Type Micro dynamic Driver Size 0.6 (14.8 mm) Frequency Response Wideband / Hifi / Narrowband Digital Signal Processing (DSP) Yes Listening Mode One ear Microphone Microphone Type Dual microphone (Noise Blackout) Mute Function Yes Movement Sensors Yes Certifications Cisco Avaya Unify Power Supply 100 - 240 VAC, 50 - 60 Hz Ope...