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Technical Parameters Waterproof Grade IP65 Ambient noise ≤60dB Working Frequency 300~3400Hz SLR 5~15dB RLR -7~2dB STMR ≥7dB Working Temperature -30℃~+50℃ Relative Humidity ≤95% Atmospheric Pressure 80Kpa-110Kpa Features 1. Shell is made of Special PC/ ABS 2. 304# stainless steel armoured cord or PVC coiled Cord 3. Pierce-proof and Hi-Fi transmitter and receiver Users select 1. The length of the tube is flexible,standard is 900mm, the diameter of the tube :Φ8.4mm,Φ7.8mm,Φ6.5mm 2. Connector can be chosen: Y-spade,RJ11,XH-pg,USB,Audio Jack, Aviation Joint, XLR Connector,ect. 3. High strength steel rope diameter can be chosen:standard is Φ1.6mm, other diameter is Φ2.0mm,Φ2.5mm 4. Handset Color: standard is black or red, other color can be customized. 5. Microphone: Electret microphone or Dynamic microphone.