Saramonic SR-WM4C Wireless Lavalier Microphone System for Canon 6D 600D 5D2 5D3 Nikon D800 Sony DV DSLR Camcorders The Saramonic SR-WM4C is a compact and lightweight VHF wireless microphone system. Providing a perfect audio solution for record free from the limit of distance, it is very helpful in film making, broadcast interview and business presentations. Four switchable channels to keep you free from interference. Detachable and flexible antenna can be rotated 360 degree accordingly for best sound. The high-band VHF provides pure sound Record audio up to 60 meters away with no obstacle. Real-time monitor Volume control wheel LED indicator indicates the battery life Includes a belt-pack transmitter, camera mountable receiver and an omnidirectional lavalier microphone Power provided by AA battery (sold separately)