DELL WIRELESS HEADSET WL3024, Tech Specs: Audio (output/speaker): Speaker Size 28mm, Frequency Response 20Hz – 20kHz, Frequency Response (talk mode) 100Hz – 8kHz, Speaker Driver Sensitivity 119dB @ 1mW/1kHz, Noise cancellation Passive, User Hearing Protection Yes – EN50332, Audio codecs supported AAC (advanced audio coding), SBC, LC3, Audio (input/microphone): Noise cancellation (microphone) AI Up-Link Noise Cancellation, Microphone Type 2, analog, Microphone Frequency Range 100Hz – 14kHz, Microphone Direction Uni-Directional, AI Beam Forming, Sensitivity -45dBV/Pa, Signal-to-Noise Ration (SNR) 53dB, Mic Boom 260° rotational (+/-130°) (accommodate L/R Users), Design & Fit: Form Factor: On-Ear, Weight: 182g, Ear Cup Size (Diameter): 67.5mm, Headband Material: Leatherette + Memory Foam + plastic inner cap, Ear Cushion Material: Leatherette cushion, Stacking/Stowing Fold – earcup 90 deg pivot fold +/-, Battery & Charging Performance: Fast charging: Yes (Plugged), Charging Mechanism: USB-C (plug in for fast charging), Headset Battery Capacity 500 mAH, Battery Charge Time: 2 Hrs to Full, Talk/Listening Time: Talk: Up to 26 Hrs (Busy light OFF), Listening time: Up to 41 Hrs (Busy light OFF), Connectivity: Wireless Connections: BT 5.3 w/ range up to 30m/100 ft, Wireless Adapter (Teams’ BT Dongle): Yes, USB-C, Wired Connections: Detachable USB C-C (charging), Cable Length (Charging cable) 1.5m, USB Converter Adapter/Dongle USB-A (plug), USB-C (receptacle), Multi-Host connect to two devices at the same time, remembers up to 8 devices, Support Wireless & Wired Calls & Listening No, 3 Year Limited Hardware with Advanced Exchange Service