Audio signal is mainly suitable for lightning protection or digital carrier signal through the twisted pair of lightning protection equipment, such as telephone switches, a variety of telephone lines, fax equipment, MODEM, ADSL, ISDN telephone lines and other important terminals. Main features: 
 ★ flow capacity 
 ★ Multi-level protection 
 ★ core components adopt international famous brand, excellent performance 
 ★ fast response 
 ★ excellent signal transmission performance 
 ★ residual depression 
 ★ simple structure, easy installation and maintenance