1. Shell is made of Special PC/ ABS 

2. 270mm PVC coiled Cord with USB connector or RJ12 plug. 

3. Pierce-proof and Hi-Fi transmitter and receiver.

1. The standard length of the cord is270mm.

2. Connector can be chosen: RJ12 plug,USB,Audio Jack, Aviation Joint, XLR Connector,ect. 

3. Handset Color: standard is black or red, other color can be customized. 

4. Microphone: Electret microphone or Dynamic microphone.