Switch-day fed mine works when there is no transient voltage is high impedance when the show, but once the lightning transient voltage response, its low resistance to mutation, allowing the lightning current passed. Such devices are used as devices and gas discharge tube discharge gap. Main features: 
 ★ flow capacity 
 ★ bandwidth 
 ★ core components adopt international famous brand, excellent performance 
 ★ Low insertion loss 
 ★ VSWR smaller 
 ★ reliable 
 ★ simple structure, easy installation and maintenance