Main Components 1. Shell made of Special PC/ABS. 2.304# stainless steel armoured cord or PVC coiled cord. 3. High strength steel rope. 4. Pierce-proof and hi-fi transmitter and receiver. 5. Connect the permanent seat of the case. Featuresï¼? 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 8.4mm,7.8mm,6.5mm. 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 1.6mm, other diameter is 2.0mm,2.5mm. 4. Handset Color: standard is black or red, other color can be customized. 5. Microphone: Electret microphone or Dynamic microphone.