the saramonic sr-wm4c is a compact and lightweight vhf wireless microphone system. the slim, low-profile clip-on omni-directional microphone transmits its signal via a bodypack transmitter to the receiving unit. both the saramonic receiver and transmitter are lightweight and easy to use - offering ultimate flexibility without sacrificing high-quality audio. this set includes the saramonic sr-wm4c receiver, saramonic sr-wm4c bodypack transmitter and omni-directional clip-on microphone. usage providing a perfect audio solution for recording free from the limit of distance, it is very helpful in film making, broadcast interview and business presentations or any other need that requires portability and great sound quality. features four switchable channels to keep you free from interference. detachable and flexible antenna can be rotated 360° accordingly for best sound. the high-band vhf provides pure sound. record audio up to 60 meters away with no obstacle. volume control wheel. led indicator indicates the battery life.