Is it a patent source?:no color:silver Frequency Range:100HZ-20KHZ model:858 Built-in battery capacity:null Shell technology:metal plating Battery life:null time to market:2020 After-sales service:Store three guarantees Rated voltage:other Suitable:Exclusive for conferences radio head:capacitance Whether to provide exclusive supply for cross-border exports:yes packing list:Microphone Charging Cable Manual Microphone type:Audio integrated microphone pointing features:Cardioid Bluetooth version:5.0 brand:neutral physical dimension:230*77 There is wireless:none rated power:other Whether there is a built-in battery:Built-in battery signal-to-noise ratio:≥70db
