️Safe and reliable:Voltage tester has an easy to hold and ergonomic pen voltage finder, which is easy to use Accurate:Digital voltage detector has higher balance sensitivity and can carry out more accurate detection Purpose:Cable tester pen can identify conductor breaks by tracking along the cable from the source to the point where the indicator is no longer lit Multi-purpose:Non-contact electrical tester is very suitable for identifying whether there is AC voltage on sockets, switches, circuit breakers, fuses, lighting devices, wires and cables Non-contact detection:Electrical tester pen is a quick and easy method for non-contact detection of the of AC/DC voltage