Wide Measuring Range: Neon lights display voltage from 2kV to 12kV, and ordinary strobe lights a long service life of 20,000 times. No need to add batteries The sturdy ABS shell can withstand cold climates but is not waterproof. Simply push the copper probe into the ground and let the top hook touch the adhesive. It will display the voltage reading range. Voltage: 2kV -12kV Material: Plastic Color: Black + Blue Package Contents: 2 x Fence Alarm Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.