Power transformer suitable for 800 W input with maximum output power of 500 W. Small transformers cannot exceed their rated output power; for example, a 50 W transformer cannot output 80 W. Voltage stabilizing function: operates between 8 V to 10 V. When input voltage is close to 12 V, the voltage stabilizing function is not active and output may have pulse fluctuations. The voltage stabilizing function supports 220 V to 220 V voltage sampling. Features input reverse connection protection and 10 V low voltage under-voltage protection. Output frequency: 50 Hz (pre-adjusted before shipment). Output voltage is set to approximately 220 V prior to shipment; AC side voltage may fluctuate. Includes a small fan to assist in maintaining waveform stability. Can output an approximate sine wave when used with a capacitor at the output, but capacitive components may consume power and reduce conversion efficiency. Not recommended for inductive loads. Input voltage: 10 V to 15 V Output waveform: square wave or sine wave (depending on transformer type and 220 V feedback; without feedback, outputs square wave) Quasi sine wave inverter drive board Requires external 50 Hz, 220 V transformer with 812 V input. Even with feedback voltage above 10 V, voltage stability may vary. Low-voltage side winding compatible with standard transformer silicon steel sheets Dimensions: 88 x 72 x 46 mm Material: ABS Color: Green + White Package Contents: 1 x Inverter Drive Board Only the above package content; other products are not included Note: Lighting and display differences may cause slight variations in color between the image and actual item. Measurement allows an error of +/- 13 cm.