1. This board is high-frequency square wave AC output, so it can not be carried by general inductive appliances (motor, fan coil transformer, etc.) 2. When connecting to a small load (LED light, mobile phone charger, DVD player, J top box, etc.), it is recommended to connect the gear with low output voltage, such as 172V or 200V 3. It is recommended to increase the heat sink when working for a long time with load ( 100W), 4. The power supply should not be connected in the opposite direction. In addition, the power supply and power line should have enough current. The output should not be overloaded or short-circuited. 5 When the high-frequency no-load voltage is output, the measurement with a multimeter will show a high voltage (incorrect, not the actual voltage) Product parameters Power: 50-150W Input: DC12V Output: 220V Quiescent current: about 0.05A Output waveform: high-frequency square wave Output frequency: about 20KHz Protection: no protection Weight: 64.1g with the size of 3 x 10cm, which is mainly used for the front stage of electronic DIY inverter. When the high-frequency no-load voltage is output, the measurement with a multimeter will show a high voltage (incorrect, not the actual voltage) The default output wiring is as follows: "For reference only" V0--V2=110V V0--V3=175V V0--V4=200V V0--V5=220V V5--V4=20V V5--V3=45V V5--V2=110V V4--V3=28V V4--V2=90V V3--V2=62V Different batches of different colors may be different without affecting the use color: blue Material: pcb Package Contents: 1 x converter 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.