1. 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 2. 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 output a large-capacity, high-voltage capacitor in parallel (it is 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 leave excess capacitance after use; High pressure danger, use need to pay attention to safety 3. Package includes: 1 x Voltage Booster Module (without retail package)