Lenovo Wireless VoIP Headset Head band Office Call center Bluetooth Black 20000024 9 mm Depth 23 DMC HDO 9 mm Depth 23 67:1 (4:3 aspect ratio) Focal length range 16 Lenovo Wireless VoIP Headset (Teams) 3 Headphones Ear coupling Supraaural Headphone frequency 20 20000 Hz Impedance 32 Ω Driver unit 4 cm Microphone Microphone type Boom Microphone frequency 100 8000 Hz Microphone noise canceling Yes Battery Continuous audio playback time 60 h Talk time 31 h Fast charging Yes Battery recharge time 2 h Weight & dimensions Width 177 mm Depth 154 mm Height 60 mm Weight 140 g Packaging data Package width 211 mm Package depth 206 mm Package height 76 mm Package weight 428 g Packaging content Quick start guide Yes Receiver included Yes Warranty card Yes Cables included USB Type C to USB Type C