Outstanding audio quality: Thanks to Yealink's Optima HD Voice and Smart Noise Filtering Technology, the AX83H delivers excellent sound quality, enabling clear conversations without disruptive background noise. Integrated Wi-Fi 6 and Bluetooth 5.0: Equipped with dual-band 2.4G/5G Wi-Fi 6 and Bluetooth 5.0, the device ensures stable and fast wireless connections. Seamless roaming: Support for IEEE 802.11 k/v/r roaming allows for uninterrupted connections, making it ideal for large workspaces such as warehouses or offices. Powerful battery: The rechargeable battery provides up to 9 hours of talk time and 200 hours of standby time. Multiple SIP accounts: Support for up to four SIP accounts allows for flexible management of multiple lines and phone numbers. User-friendly design: The 6.1 cm (2.4 inch) color display and intuitive keypad ensure easy operation. The sleek design with a smooth metallic finish and optional belt clip offers added mobility. Enhanced connectivity: Support for Bluetooth headsets and wired 3.5mm headsets for hands-free operation.