This power transformer is suitable for 800W, with a maximum output of 500W. A small transformer cannot provide the rated output; for example, a 50W transformer cannot provide 80W output. Voltage stabilization function: When the transformer is near 12V, there is no voltage stabilization function, only output pulse. The voltage stabilization function for 8V to 10V transformers includes fine-tuning for voltage adjustment. The voltage stabilization function is designed to meet 220V to 220V voltage sampling boards. Features input reverse polarity protection and a 10V low-voltage undervoltage protection function. Output frequency: 50 Hz, can be 'trimmed' (adjusted to 50 Hz before delivery). Output voltage is adjusted to approximately 220V before delivery. This type of AC-side voltage regulator has fluctuations. With a small fan, when it can be in the transformer's output capacitance with fixed waveform, can output approximate sine wave, but a capacitive will consume a certain amount of power, reduce conversion efficiency, do not take the perceptual load, plus a capacitor is not recommended. Input voltage: 10V to 15V Output waveform: square wave, sine wave (depending on the use of transformer and 220V voltage feedback decision, no feedback square wave) Quasi-sine wave inverter driven plate Requires external 50 Hz, 220 V transformer 8-12 V transformer, also 10 V over feedback voltage 220 V, may not to voltage stability, low pressure side of a winding can (standard transformer silicon steel sheet) Size: 88 x 72 x 46 mm Material: ABS Color: Green+white Package Contents: 1 x Inverter Driver Board Only the above package content, other products are not included. Note: Light shooting 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.