we can supply Non-contact AC voltage detector Here are brief introduction of our company: Shenzhen Noyafa Electronic Co., Ltd. is professional manufacture factory of producting compositive collocation cable testers .We empolder ,design,product and sell all tools by ourselves.we with plucked up domestic network products brand with hisself task ,in order to reduced client using cost tenet.It introduce into has advantage external manage pattern . 1. The NF-608 is useful for identifying hot and neutral conductors, finding a break in a wire, and detecting the presence of ac voltage at outlets,switches, circuit breakers ,fuses,and wires and cables. 2. Round cords may have twisted conductors .check for hot conductors by sliding the unit along the cord . 3. The NF-608 voltage detector can be used to find a break in a wire.