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 on the go. The set includes an SKM-S handheld transmitter with an MMD 835 cardioid dynamic microphone module. It's great for on-camera interviews and capturing clear audio in noisy places. The receiver is compact and user-friendly. It has a front-facing OLED display for easy menu navigation. You can sync it via Bluetooth with the Smart Assist app to save time. It has multiple powering options and can be easily integrated into your camera setup. Dimensions: 86 x 67 x 28 mm (3.39' x 2.64' x 1.1'), Weight: 994g. Operating Temperature: -10 °C - +55 °C (14 °F - 131 °F).