1、HIGH FREQUENCY: Fingerprint lock tester generates a high frequency electromagnetic wave field. Energy saving lamps induce electromagnetic waves to generate current. 2、PRE USE TEST: No electricity is required to light the high efficiency bulb. When the instrument is close to the light emitting tube part of the lamp, the lamp will light up. 3、APPLICABLE: Used in laboratories, electronics research and development and other factories to test electronic motherboards for anti interference testing experiments. 4、EASY TO USE: Coil EMP electromagnetic pulse tester built in reinforced antenna and external high frequency antenna. Charging time is only 5 hours, very easy to use. 5、WARM TIPS: Do not touch the transmitting power coil of the instrument, as this will reduce the power and affect the use of the instrument.