1、Partition wall inspection, safe zero contact, to improve the safety factor for the inspection and maintenance of electrical inspection and home improvement. 2、One‑key switch Press and hold for 2 seconds, the light will turn green and switch to the partition wall measurement. The default 48~1000V measurement is turned on. Short press to switch 12~1000V. 3、Easy to use, one picture to understand, safe power measurement effectively reduces misjudgment of the line. 4、Intelligent shutdown, the tester will automatically shut down if there is no operation within 5 minutes and no AC voltage is detected. 5、Rugged and durable, the body is made of ABS drop-resistant material, and the pen tip will not break when dropped at two meters. 6、IP67 deep waterproof, newly upgraded closed waterproof housing, can work even in humid places. 1 x Tester Pen(Battery Not Included)1 x Manual Item Type: Tester PenMaterial: ABSModel: AC20Power Supply: AAA 2x 1.5V (not included)Purpose: Line inspectionWaterproof Rating: IP67 AC voltage detection 12~1000V/48~1000V (default 48V) Alarm mode sound and light alarm + red, green and orange indicator light Illumination flashlight White LED light Lamp Neutral line and live line judgment Signal strength and light-on judgment, red light is live line, green light is neutral line Indication method Through different frequency alarm sounds and red, green and green flashing indicators Probe status flat Automatic shutdown within five minutes without any operation, no detection signal, automatic shutdown Low battery warning The voltage is lower than 2.6V, the power light flashes three times, and the buzzer sounds once Safety level EN61010-1/1000V  CAT lll