This Sennheiser EW-DP 835 SET (R4-9) is a portable digital UHF wireless microphone system. It's perfect for filmmakers, content creators, and broadcasters. With its all-new portable design, it can be used in various shooting scenarios. The system comes with an SKM-S handheld transmitter and an MMD 835 cardioid dynamic microphone module. It has a compact digital receiver for an easy user experience. Dimensions are 86 x 67 x 28 mm (3.39' x 2.64' x 1.1') and weighs 994 grams. It operates in temperatures from -10 °C to +55 °C (14 °F - 131 °F). Ideal for on-camera interviews and getting clear audio in noisy places.