Our goal is to provide high quality products at competitive prices, and top-notch service to customers around the world. We are ISO9001, CE, and GS certified and strictly adhere to their quality specifications for Testing Electrical Equipment, Audio Sweep Signal Generator 20hz ~ 20khz 20w , Grounding Resistance Tester , Low Frequency Signal Generator ,Safety Measurement Verification . Only for accomplish the good-quality product or service to satisfy customer's demand, all of our products have been strictly inspected before shipment. The product will supply to all over the world, such as Europe, America, Australia,Poland , Estonia ,Puerto Rico , Chile .The company has perfect management system and after-sales service system. We devote ourselves to building a pioneer in the filter industry. Our factory is willing to cooperate with different customers domestic and overseas to gain better and better future.