1、 Design of left and right double knobs allows user to operate transmitter and receiver conveniently and respectively with left and right hand. 2、 The receiver is designed with touch switch that be hold to activate receiving signal and loosen to close reception signal, which is a power-saving design because receiver usually has large power consumption. 3、 Higher specification of safety, the receiver probe has ABS insulation protection, improve the product safety and prevent electric shock hazard while improving the detection sensitivity as much as possible. 4、 This cable finder is a low-voltage cable tracking product, so it is designed with no screw battery holder, which is easier and safe to replace battery. 5、 Main functions are analog signal detection, network/telephone cable tracking, positioning; line sequencing function; checking working status of telephone; line sequencing under energized state of high-power switch hub (under 48V); continuity test func