Specifications: A perfect tool kit for home and electric industry uses. Ideal design for testing power cables, circuit breakers, wall sockets, junction boxes, fuses, etc. Just press the button, white LED light can be always on when there is absence of voltage. Beep sound and red flashing LED would indicate the presence of voltage. Totally insulated, no exposed metal or conductive parts. Long life and low power consumption. Compact, safety & easy to carry. Type: LED Light Voltage Alert Pen Material: ABS Plastic Frequency Range: 50-500 Hz Test Voltage Range: 90-1000V AC Safety Rating: CAT II 1000V Powered by: 2 x AAA Batteries(Not Included) Features: Safety, Easy to Carry, Alert Tester Pen, Long Life, Low Power Consumption Size: 152mm x 23mm x 15mm/5.98" x 0.91" x 0.59" (Approx.) Notes: For your safety, please to keep the pen dry. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x LED Light Voltage Alert Pen (Batteries are not included.)