Features: Two gears can not be used at the same time or it will get burned Charging: 3 holes are separately. Each hole is for about 30 minutes one by one. When all three holes are , the whole battery is fully . When the indicator light of the charger, green light, is off, it means that it is fully Pay attention to the use time: do not use it for more than 10 seconds each time. Use it for 3 times continuously. Take 20- to cool down the instrument. Prevent it from burning out due to high temperature Principle: The EMP Generator produces a high-frequency electromagnetic wave field. An energy-saving lamp around the generator induces electromagnetic waves and generates an electric current. When the electric energy is sufficient, the bulb will light up. PS: There is no that the energy-saving lamp will work. If it is on, it proves that the meter is working. Specfifications: Frequency: 150MHZ Typical applications: Fingerprint lock, slot machines, claw , game machines, etc. Working voltage: DC 36V Antenna mode: built-in reinforced antenna + external high-frequency antenna Charging time: 1.5 hours in total Built-in rechargeable battery Note: Intermittent work (one click). Cannot work continuously. There are not many machines that can be scored. Try more machine location. The product is a dual-frequency version, 1.2 gears do not open at the same time to use Test Before Use: The EMP generator can light up an efficient bulb without power on. When the instrument is close to the luminous tube part of the lamp, and the lamp will light up, indicating that the quality of the instrument is good. It can be used for related tests. Do not touch the transmitter power coil of the instrument, otherwise the power will be reduced and affect the use of the instrument. Plug Type: US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the , the Philippines and so on. voltage: AC110V Material: plastic colour: Black Package Contents: 1 Set EMP Generator Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.