Widely used for all kinds of electric equipments which power consumption are less than 300W and which voltage are equal to AC 220V, such as cell-phone, portable computer, electric light, digital camera, TV, CD player, DVD, electric fan, electric tool and so on. It can be made from advanced PWM CMOS chip, and can work in the state of ultrasonic sound, which can both in a great extent minimize the bulk and weight and make the circuit work without noise. The output of the product is a universal socket, which can be used in many countries.
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