4G Wireless This earphone uses a 2.4GHz wireless transmission frequency band with a 24bit/48KHz sampling rate, ensuring professional sound quality is preserved during use. 30 Meters Effective Distance Enjoy the freedom of movement with an effective distance of up to 30 meters, allowing you to move around without being restricted by cables or wires. Multifunction and Compact Design With a small size and a lavalier design, this earphone serves as both transmitter and receiver and can be transformed into a mini bodypack machine, offering versatility and convenience. Quick Pairing A blue LED indication enables quick pairing in just 1 second, ensuring a hassle and efficient connection process. Practical use scenarios Live stage performances and events: move on stage without cables while maintaining reliable audio transmission. On set film and TV production: lightweight wireless mic solution that speeds up setup with fast pairing and compact form factor. Corporate presentations and public speaking: clear, quality sound for presenters without distracting cables.