Yealink BH72 Bluetooth Wireless Headset, Wired Charging. The Yealink BH72 lite packs high-definition audio quality, retractable hidden microphone arm technology and Yealink Acoustic Shield Technology. Features: Product: Yealink BH72 Lite Teams Product type: Headset Connectivity technology: Wireless, Bluetooth Recommended usage: Office/Call center Headphone frequency: 20 - 20000 Hz Wireless range: 30 m Weight: 187 g Product colour: Black