The UT12D with high and low dual-mode voltage range detection 24V～1000V and 90V～1000V, intelligently identifies zero-fire lines. CAT IV 1000V safety level ensures user-safe, audible and visual alarm synchronization, it's an essential tool for industry and home.   Features: High and low dual sensitivity AC voltage range of 24V～1000V & 90V～1000V;  Detect AC voltage by contacting the power socket or getting near the live wire with non-contact tip.  Visual and audible alarm to secure your safety.  With flashlight, convenient to use at night or dark corner.  Intelligently identifies zero-fire lines, low voltage indication.  Automatically turn off when no operation and no detection of AC voltage after 5 minutes.  Light weight and mini size allows you to take anywhere anytime.   Specifications: Material: ABS;  High Low Dual Mode Detect Range: 24V～1000V(Low Sensitivity, green) / 90V～1000V(High Sensitivity, red);  Frequency: 50/60Hz;  Alarm Mode: Sound and light alarm;  Flashlight: White LED light;  Auto Power Off: Approx. 5 minutes;  Low Battery Indication: ≤ 2.4V;  Drop Test: 1m;  Zero-fire Lines Distinguish: Yes;  Power Supply: 2 * 1.5V AAA battery (NOT included);  Security Level: CAT IV 1000V;  Operating Temperature: 0~40℃;  Storage Temperature: -10~50℃;  Item Size: Approx. 150 * 23 * 18mm / 5.91 * 0.91 * 0.71in;  Item Weight: Approx. 32g / 1.14oz;  Package Weight: Approx. 52g / 1.85oz;  Package Size: Approx. 20 * 4.5 * 4.5cm / 7.88 * 1.77 * 1.77in;   Package List: 1 * Voltage Tester Pen;  1 * User ManualManual