Overview: Detects AC voltage without metallic contact White LED illumination light, convenient for operate in darkness Fits in a shirt pocket for convenience Features a alarm prompt sound Entire outer surface are non-conductive for safety, helps avoid high voltage shock Quickly locates the hot, neutral & ground terminals in any receptacle Voltage Sensitivity: 90~1000V ACPowered by 2 1.5V AAA batteries (not included) Specification: Dimensions: 15 x 2.5 x 1.6cm Weight: