Portable Size:Less than the size of a finger, compact and lightweight design, easy to carry, wireless connection, not limited by cable length, the maximum connection range can reach up to 60 ft, Can be easily clipped to the collar, lanyard or put in the pocket. Real-time Crystal Voice Syncs:Using real-time auto-sync technology, which extremely reduce the video post-editing. To Support Multi-Channel Real-Time Mixing, it can synchronize the background music for phone and human voice in real time.