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.

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.