Features 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 1.5 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. specificationItem Type: Coil Tester Material: ABS Typical Application: Fingerprint Lock Working Voltage: DC 36V Antenna Mode: Built In Reinforced Antenna, External High Frequency Antenna Power Supply Voltage: DC 36V Charging Time: 1.5 Hours Plug : US Plug 100-240V PackageList1 x CoilTester 1 x Power Adapter Note1. Pay attention to the use time. Do not use for more than 10 seconds at a time. Allow to cool for 20?30 seconds after 3 consecutive uses to prevent burning due to high temperatures. 2. Please do not touch the metal emitter part when using, it may burn your hand.