Description: 【Easy to use】: EMP Electromagnetic Tester has built-in reinforced antenna and external HF Charging time is only 1.5 hours, very easy to use. 【High】: Fingerprint Lock Tester generates high electromagnetic field, energy-saving lamps induction electromagnetic wave to generate current. 【Test before use】: Coil Tester can light up high-efficiency bulbs without electricity. When the instrument is close to the light-emitting tube part of the lamp, the lamp will light up. 【Applicable Scenario】: Small Black Box Tester for laboratories, electronics research and development and other factory testing electronic motherboards for anti-interference test experiments. 【Warm Tips】: Please do not touch the Fingerprint Lock Detection Device transmit coil, otherwise it will reduce the power and affect the use of the instrument. The product can only be charged with the special charger equipped, do not use other models of chargers to avoid voltage mismatch. 1.2 gears do not open for use at the same time, for testing purposes only. Size Chart: 15cmx14cmx3cm/5.91inchx5.51inchx1.18inch Package Includes: 1 Coil Tester 1 x Triode 2 x Coils 1 metal pin 1 x American Standard Plug Note: Please allow slightly errors due to manual measurement and different monitors.