R’deer Non-Contact Voltage Tester RT-D106

R’DEER RT-D106 Voltage Testing Range:90-1000V Frequency Range:50Hz-60Hz Operating Style: Automatic Warning Mode: Sounds/Light Switch Mode: Press Battery:2*AAA Battery Included: Yes Standard :CAT IV 1000V Features: It can distinguish zero light and live wire when the voltage is at 250V.