Features: brand new and high quality Distinguish the live and nu ll wire through the different frequency of alarm sound. When it senses the voltage around, it start beeping, even though the tester pen hasn'for t touched the item. As voltage for stronger, it beeps lounder. Non-contact voltage detection, practical and convenient way to test electrical lines, Audible and visual alarm for always guard your safety. Using the ABS and PVC material, the Voltage Tester can stand wear and tear, and its pocket clip allows easy handling. Auto power-off feature conserves energy while the LED torch allows operation even on dark corners. You can use the non contact voltage detector in circuit breakers, lighting fixtures, switches, outlets, wires and anywhere you need it, the pen tester also acts as an emergency flashlight which can illuminate the working area. Specifications: Material: Plastic Pen Size: 17X2cm/ 6.69x0.79 inch Wire Height: 100cm/ 39.37 inch Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Non-contact Pen Alarm