EER RT-D99 Multifunctional Blue Light Digital Display Tester Pen Yellow is designed to check electrical circuits and detect AC voltage in a safe way. When voltage is detected， the light turns blue. This tester conforms to the international safety standard so you can rest assured to rely on it. It has a wide variety of applications， for office， industrial， home use etc. You might as well take it back home!                                    Features             Check electrical circuits and detect AC voltage in a safe way<br> Small size， lightweight for easy operation<br> Conform to international safety standard<br> With night vision function<br> Interaction working mode， easy to use   <br>                                                            Specifications             Material     ABS    <br> Color     Yellow    <br> Dimensions     (6.26 x 0.87 x 0.63)" / (15.9 x 2.2 x 1.6)cm (L x W x H)    <br> Weight     1.16oz / 33g     <br> Primary Functions     Test Circuit     <br> Features     Night Vision Function     <br> Measurement Range     AC / DC 12V-250V     <br> Maximum Show Value     220V     <br> Scope of Application     Office， Industrial， Home Appliance    <br> Light Color     Blue       <br>                                                             Package Includes            1 x ROBUST DEER RT - D99 Multifunctional Digital Display Tester Pen <br>