‌SKM 2020-D, speaking into a hand-held microphone is the easiest way to address your audience. Should a tour participant pose a question, just hand over the microphone and everything will get clearly through to everybody. Interviewing an expert in front of your audience will make your tour even more interesting. The SKM 2020-D efficiently attenuates unwanted background noise. The transmitter is easy and comfortable to operate and highly robust. Check the back-lit display for channel and battery status. The rechargeable battery lasts for a tour of 8 hours straight. After the tour, simply quick-charge the battery pack in the charging case EZL 2020-20L which has an extra slot to charge and store a spare pack. Features Digital RF signal transmission Licence free Frequency range (EU, US) Roughed stage-proven housing Ideal in noisy environments Intuitive operating concept Backlit display Technical Data RF frequency range 926 - 928 MHz 863 - 865 MHz Frequency response 100 - 7,000 Hz THD, total harmonic distortion ≤ 1% Transducer principle Dynamic Weight 420 g Range 50m / 100m Indoor / Outdoor Pick-up pattern Cardiod Operating temperature 0 - 50 °C Signal-to-noise ratio > 65 dB(A) RF output power 10 mW Number of channels 6 Operating time 8 h Modulation 2-FSK Power supply BA 2015 (2,4 V); 2 AA (1,5 V)