2 Year Warranty. Real Time Monitoring --- The receiver has a 3.5mm headphone monitor jack for real-time monitoring to ensure smooth recording. Built-in Mic & External Lapel Mic Recording --- Each transmitter is with a lav mic and also designed with a built-in omni-directional microphone. Users can clip the transmitter on the collar to pick up sounds, while they can also plug a lavalier microphone into transmitter’s MIC IN jack for sound capturing. The External Lapel Mic is included in the pakage. OLED Display --- BY-XM6 is an easy-to-use Cordless Wireless Microphone Kit. With vivid and easy-to-read OLED display on transmitter and receiver, you can check the pairing status, battery level, Audio input level, output mode, volume and other information on the screen precisely. Rechargeable Microphone & Long Battery Life --- Featuring a high-quality capsule and signal processing circuit. Built-in rechargeable lithium battery, can work continuously for 7 hours. USB Type-C charging interface, support on-the-go charging, no stress during the whole day of shooting. 328ft Long Range & Stable Transmission --- BOYA wireless lavalier microphone BY-XM6 uses the 2.4Ghz transmission frequency band and can support up to 328ft of barrier-free transmission distance, and take the hassle out of being bound by wires. Dual Channel Wireless Microphone System --- The BOYA BY-XM6 S2 is a 2.4GHz adaptive frequency hopping wireless lavalier microphone system, consists of 2 transmitters and a receiver. It’s a perfect sound capturing and delivering solution for 2-person vlog, YouTube video, live streaming, interview, podcast recording etc.