... 1.the electric fence system can be made in 4 strands,6 strands,8 strands, ... resist invade effectively. 4, Alam: intruder break in forcedly, the system will send out two alarm ... rate, advanced alarm principle, overcome the technical flaw in infrared ,microwave, the electrostatic induction ,all insulators ... dismantle or destroy, will send out alarm signals in time. 16. Long distance controlled by keypad ...