1Compact size for easy carrying and operation. 2It can be used to check the quality of lightbulbs or fingerprint locks. 3Plug-in emitting heads, triode can switch by yourself. 4The coil can be adjusted by yourself. If the coil is reduced, the power will be reduced, otherwise, the power will be increased. 5High frequency power, fine effect, more stable. 6Window opening design for quick heats dissipation. 7Stable and long-lasting power, the chip is not easily damaged. 8The voltage can be observed for timely recharging. The EMP Generator produces a high-frequency electromagnetic waves field. An energy-saving lamp around the generator induces electromagnetic waves and generates an electric current. When the electric energy is sufficient, the lightbulb will light up. It can also be used to check the quality of fingerprint locks. Features: Compact size for easy carrying and operation. It can be used to check the quality of lightbulbs or fingerprint locks. Plug-in emitting heads, triode can switch by yourself. The coil can be adjusted by yourself. If the coil is reduced, the power will be reduced, otherwise, the power will be increased. High frequency power, fine effect, more stable. Window opening design for quick heats dissipation. Stable and long-lasting power, the chip is not easily damaged. The voltage can be observed for timely recharging. Specifications: Plug: US-plug, EU-plug (optional) Main color: black, white (optional) Material: ABS Battery: 3.7V, 250mAh Host size: 80 x 43 x 24mm or 3.1 x 1.7 x 0.9in Package size: 110 x 105 x 65mm or 4.3 x 4.1 x 2.6in Package weight: 182g or 6.4ounce Packing List: 1 x Electromagnetic Pulse Generator 1 x Power Cable 1 x User Manual 2 x Coil 1 x Triode 1 x Electromagnetic Pulse Generator 1 x Power Cable 1 x User Manual 2 x Coil 1 x Triode