The Sennheiser EW 500 FILM G4 Pro Camera Lavalier MKE 2+ Set Ch38 is a professional all-in-one wireless system for professional film productions. The wireless system provides you with flexibility allowing you to use the 48V phantom power equipped SKP 500 to turn all wired mics into a wireless transmitter. The transmitter and receiver feature a range of up to 100 meters with up to 8 hours of operation time allowing you to move freely without fear of losing power or signal. The included MKE 2 clip-on microphone offers the highest speech intelligibility providing you with excellent sound quality.