Comica BoomX-DUC RX Wireless Microphone System for Comica BoomX-D Mic, 2.4G Wireless Microphone for USB C Smartphone/Laptop, Lav Mic for Recording Podcast Interview YouTube Vlog/Live-Stream(1Receiver). 2.4G DIGITAL RF TECHNOLOGY WIRELESS MIC? Comica BoomX-DUC RX is designed for reliable and trouble-free performance. Working distance up to 50ft and our frequencies has no conflict with the govt frequencies for safe usage. Comica BoomX-DUC RX is a receiver compatible with comica BoomX-D series wireless lapel microphones. With metal case for excellent shielding. It has great signal and picks up audio with no other noises. MONO/STEREO SWITCH AND REAL-TIME AUDIO MONITORING? Comica BoomX-DUC RX lavalier mic provides mono/stereo switch (Please note that smartphone can not output stereo audio). Equipped with 3.5mm headphone monitor hole, you can test whether it is working normally during recording. AUTO FREQUENCY ADJUSTAMENT AND LOW LATENCY? Comica BoomX-DUC RX USB-C laptop wireless microphone can be paired automatically and choose the best channel for stable and smooth signal transmission. Allowing audio to be transmitted faster an latency to be reduced to less than 20ms, high fidelity and fast transmission. 48KHZ 16 BIT BROADCASTING QUALITY AUDIO? The latest professional audio technology provides high-fidelity broadcast-quality sound, accurately captures the target sound source, and records clear and natural voice. Widely used for YouTube video recording, interviewing, vlogging, wedding and broadcasting with ipad, laptop, smartphone etc. With special care and it usually takes 2-7 days to your country. And we will work with you to resolve it to your satisfaction.