Ultra-Portable: WH64 Hybrid headset with lightweight DECT dongle and a drawstring bag, ideal for professionals on the go. Dect & Bluetooth dual mode supports seamless plug-and-play with multi-devices (PC/cellphone/desk phone) 492 ft Longer Range: Advanced DECT tech delivers an impressive wireless range of 492 feet. DECT wireless headset have higher call security, greater anti-interference, and 2x deployment density of Bluetooth. All-Day Life: A quick 1.5-hour charge provides up to 41 hrs of music playback and 26 hrs of talk time. Plug one end of the USB 2.0 Cable (USB-A to USB-C) into the charging port of the headset. Bluetooth headphones with mic for work can stay powered all day while traveling or working. AI Noise Cancelling Headset: 3-Mic Noise Cancellation and 6 audio equalizers, backed by Acoustic Shield Tech 2.0, deliver crystal-clear calls. Office phone headset has call control, busylight and quick mute option (pull-up mic or mute button) for focused meetings. Yeali