Versatile and feature-rich digital wireless system for those who sing, speak or play instruments that allows for seamless product pairing and management via the EW-D Smart Assist App. This handheld transmitter is compatible with a wide range of Sennheiser and Neumann microphone capsules. Features Digital transmission operating in the UHF spectrum greatly enhances range, reliability and scalability Smart Assist App connects via Bluetooth Low Energy for a streamlined setup and operation at a distance Auto scan creates reliable connections with minimal time and effort 134 dB audio input dynamic range eliminates need for sensitivity adjustments and preserves every detail Elimination of intermodulation enables channels to be placed in an equidistant tuning grid 600 kHz apart 56 MHz of tuning bandwidth and equidistant spacing enables up to 90 channels 2,240 selectable frequencies allow for fine tuning Lithium-Ion battery pack (sold separately) delivers up to 12 hours of operation (up to 8 hours of operation with 2x provided AA batteries Specifications Frequency range: 606.2 - 662 MHz THD, total harmonic distortion: = -60 dB for 1 kHz @ -3 dBfs input level Weight: approx. 304 g (incl. MMD 835 microphone module); approx. 195 g (without microphone module) Operating temperature: -10 °C - +55 °C (14 °F - 131 °F) Power supply: 2 AA batteries 1.5 V (alkaline manganese) or BA 70 rechargeable battery pack Current consumption: < 300 mA Input voltage range: 2.0 - 4.35 V Transmission power: Audio link: 10 mW; ERP (Range Y1-3): 12 mW ERP; BLE: max. 10 mW EIRP Operating relative humidity: 5 - 95 % (non-condensing) Audio frequency response: 20 Hz - 20 kHz (-3 dB) @ 3 dBfs Dimensions: 50 x 268 mm (incl. MMD 835 microphone module); 40 x 200 mm (without microphone module)