This VoltAlert AC non-contact voltage testers are easy to use just touch the tip to a terminal strip, outlet, or supply cord. When the tip glows red and the unit beeps, you know there voltage present. Electricians, maintenance, service, safety personnel, and homeowners can quickly test for energized circuits in the workplace or at home.

Features:
High quality pocket-sized voltage detector
Voltbeat technology and continuous self-test so you always know it working
Upon detection, tip glows and buzzer sound
CAT II 1000 V for added protection
With a super bright LED light
Pen shape, mini size, easy to use and portable

Note:

Please check it before use, if the light and sound are weak, please replace the batteries inside
Don't place the tester near high voltage
Never test the voltage which than 1000V AC

Specifications:

Color:Yellow
Test voltage range: 90-1000V AC IP54, IEC 1010
Powered By: 2 x AAA Batteries (Not included) 
Battery life:6 hours for continious using
Frequancy range: 50 to 500 Hz
Operating Temperature: -10°C ~ 50°C
Operating Humidity 95
Safety Rating : 1000V, CAT II
Dimension: 153*20*16mm(APPROX)

Package Include:

1 * LED Light Voltage Alert Pen

Batteries Not included