100% Brand New Small and compact pen design for easy carrying Cleaning: clean with damp cloth This instrument is only used to judge whether the conductor is live or not. Ideal for testing AC cables, circuit breakers, wall sockets, junction boxes, fuses, etc. All outer surfaces are non-conductive for safety Touch the wire with the pen tip. If the red indicator lights up, it means voltage exist. Detects voltage without metallic contact. Voltage Sensitivity: 90~1000V AC (never test the voltage which is more than 1000AC)Operating Temperature : -10°C ~ 50°CStorage temperature: -10°C ~ 50°CThe voltage detector designed for electrical testing Compact, safety, & easy to carry Frequency Range: 50 to 500 Hz Test Voltage Range: 90-1000V AC Power by: 2 x 1.5 V AAA batteries A necessary tool for everybody who works with electricity Ideal design for testing power cables, circuit breakers, wall sockets, junction boxes, fuses, etc Long life and low power cons