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. Shell is made of Special PC/ ABS 2. Cord: 304# stainless steel armoured cord or PVC coiled Cord 3. Pierce-proof and Hi-Fi transmitter and receiver, noise cancelling microphone is available. ...