Yealink CPW65, Conference microphone, 1880 - 1900 Hz, Omnidirectional, 118.1" (3 m), Wireless, 787.4" (20 m) Yealink CPW65. Type: Conference microphone, Microphone frequency: 1880 - 1900 Hz, Microphone direction type: Omnidirectional. Connectivity technology: Wireless, Maximum operating distance: 787.4" (20 m), USB connector type: Micro-USB. Product color: Black, Mounting type: Table, Cable length: 11.8" (0.3 m). Power source: Battery, Talk time: 13 h, Standby time: 11 day(s). Width: 3.09" (78.6 mm), Depth: 3.09" (78.6 mm), Height: 0.602" (15.3 mm)