This Sennheiser EW-D ME2 SET Digital Wireless Lavalier System is perfect for those who speak or present on stage. With a metal housing bodypack transmitter and an unobtrusive clip-on microphone ME 2 (omni-directional), it offers high speech intelligibility. The system features digital transmission in the UHF spectrum for enhanced range, reliability, and scalability. It connects via Bluetooth Low Energy with the Smart Assist App for easy setup and operation at a distance. Auto scan creates reliable connections quickly. The 134 dB audio input dynamic range preserves every detail without sensitivity adjustments. Elimination of intermodulation enables channels to be placed 600 kHz apart in an equidistant tuning grid. With 56 MHz of tuning bandwidth and 2,240 selectable frequencies, you can fine tune. A Lithium-Ion battery pack (sold separately) provides up to 12 hours of operation (8 hours with 2x provided AA batteries). The frequency range is 552 - 607.8 MHz and the cable length is approx. 1.60 m. The bodypack transmitter (EW-D EM) has dimensions of 212 x 44 x 189 mm, weighs approx. 1000 g (without antennas and power supply), and has a current consumption of ≤ 300 mA with an input voltage range of 11 - 13 V. The clip-on microphone (ME 2) has a cable length of approx. 1.60 m, a 3.5 mm jack connector, frequency response of 50 to 18,000 Hz, max. sound pressure level of 130 dB, and is powered by 7.5 V.