"Quality initially, Honesty as base, Sincere company and mutual profit" is our idea, in order to create repeatedly and pursue the excellence for External Mic Tester, Rek 500v 600v 1000v Ac/Dc Insulation Resistance Teste , Power Frequency Voltage Withstand Test , Audio Polarity Tester ,Double Output Adjustable For Laboratory . We guaranteed high quality, if clients were not satisfied with the products' quality, you can return inside 7days with their original states. The product will supply to all over the world, such as Europe, America, Australia,Costa Rica , Estonia ,Rome , Suriname .Merchandise have been exported to Asia, Mid-east,European and Germany market. Our company has constantly been able to update the items performance and safety to meet the markets and strive to be top A on stable quality and sincere service. If you have the honor to do business with our company. we'll undoubtedly do our very best to support your business in China.