?BOYA Guarantee? 24-month warranty and friendly after-sales service.If you have any question ,please contact us. ?Super Long? This mini microphone is 4m (13ft), compact and portable. Very suitable for Online Teaching, Speech, Live Streaming, Singing, Musical Instruments, Podcasting, Interviews, Voice Recording, Video Conference. ?Plug & Play? No additional power supply is required for the lapel microphone. It can be used normally just by inserting the USB port of the computer, which is very convenient. ?USB Microphone? The omnidirectional clip on microphone can record sound clearly no matter which direction it is in. The USB port is widely used in PC, MacBook,Laptopand other devices. ?Professional Microphone? Lavalier microphone high-fidelity transmission, Signal to Noise Ratio =65dB to ensure original and clear sound transmission.