1. Principle of power saving: The voltage stabilizer stabilizes the voltage, prevents voltage instability, stabilizes and balances power consumption, achieves power saving, and extends the service life of electrical appliances. 2. The product is equipped with an anti-convex wave device to prevent current convex waves and protect electrical appliances. 3. Electronically control the capacitor to balance the current, improve the power usage of electrical products in an all-round way, and avoid the waste of useless electricity. 4. The power saver itself does not consume current, and its use 24 hours a day, 365 days a year will not increase the burden on electricity bills. 5. Suitable for air conditioners, washing machines, refrigerators, electric fans, televisions, water pumps, stereos, fluorescent lamps and other products. General households, companies, shops, and small factories are all within the scope of application. Applicable voltage:90V-240V/50Hz-60Hz Rated voltage:90v-250v Operating temperature:-60-75 degrees Rated frequency:50Hz-60Hz Individual weight:130 grams Product size:11.5x6.5x4CM How to achieve the most power-saving effect: After plugging in the power saver, it is best not to remove it or cut off the power frequently. The longer the product is used, the better the effect will be. Plug it into any wall socket in the hall, and the current in the entire home will be fully controlled for 24-48 hours. Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Voltage:AC 220V Quantity:4PCS Colour:White Material:ABS Package Contents: 4 * Household appliance saver 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.