Telephone Handset HT-500
2.Ultra-sonic bonding-twisted force test 150 LB/IN .
3.Transmitter and Receiver were adopted the high class brand
4.The spiral hose was adopted SUS 304
5.Steel cable was adopted 3/32*(7*19) air line cable, two ends were welded specially anti-drawing force over 170kg.
6.Conducting wire was adopted with tefolon high temperature wire
7.Insulation test is over DC 500V
