Features: DC 3.7V Boost 1800V, Pulse Boost Module Can work continuously, the maximum discharge distance is about 1.5MM Input voltage: 3-4.2V Input current: up to about 2A No-load current: 130MA (4.2V voltage) Output voltage: 1800V (battery voltage is low, output voltage will also become lower) Dimensions: 2.6x4.1cm/1.02x1.61inch Color: As shown Quantity: 1 Pc Precautions: When the 3V voltage is input, the output is about 1500V, the 3.7V input is about 1800V, and the 4.2V input is about 1800V. This is a high-voltage, low-current, low-power boost module. If you want to increase the instantaneous discharge current, you can connect a large-capacity, high-voltage capacitor in parallel (recommended to use 4 CB65 capacitors for air conditioners and 450V for series connection. Size you choose according to your needs) Output circuit is voltage doubler rectifier. With high voltage discharge capacitor, 1800V 223. The board has a high-voltage capacitor, which may retain residual charge after use. High voltage hazard, use with caution. Package includes: 1 x Voltage Booster Module (without retail package)