Wharfedale Pro AEROLINEDUET H AEROLINE Duet Handheld Seller:Eventec Hermann Prey and Tatiana Troyanos Hermann Prey and Tatiana Troyanos it's a celebration of HELLOWEEN's enduring impact on the metal scene Specification Value Wired Wireless Wireless Transducer Type Dynamic Polar Pattern Super Cardioid Sensitivity 98 dBm Sensitivity Adjustable Range < 55 dB ±3 dB (0 dB = 1 V Pa at 1 KHz) Maximum SPL >110 dB On Off Switch Yes Switch Colour Grey Pop Shield Colour Black Body Colour Black Cable Connector N A Polarity N A Supplied Cable 2 x Instrument Cables Working Frequency 863 865 MHz Model : 2 Channels x 20 frequencies 600 624 MHz Model : 2 Channels x 100 frequencies Channels 2 Operating Distance 100 metres (open area without interference or obstructions) RF Output 2 MHz 24 MHz RF Bandwidth 2 MHz 24 MHz RF Frequency Precision ±20 PPM Microphone SNR >90 dB (circuit section battery status and mute functions