This Sennheiser EW-D ME3 Digital Wireless Headset System is perfect for singers and speakers. It comes with a handy all-in-one digital wireless lavalier set featuring the renowned ME 3 cardioid headset microphone. The system has great features like enhanced range with digital UHF transmission, smart Bluetooth Low Energy connectivity via the Smart Assist App for easy setup and remote operation, and auto scan for reliable connections. The EM unit is 212 x 44 x 189 mm in size and weighs around 1000 g (without antennas and power supply). It can operate in a wide temperature range of -10 °C to +55 °C (14 °F - 131 °F) and 5 - 95% relative humidity. It offers great audio quality and flexibility in frequency tuning, making it a top choice for those looking for a reliable wireless headset system.