We specialize in USED test equipments, such as spectrum analyzer, network analyzer, signal generator, WLAN tester, power meters, signal analyzer, power supply, RF/wireless communication test set, Bluetooth tester, shielding box, Oscilloscopes and so on which are made by Agilent, Anritsu, R&S ,Advantest, TEK etc. Main office is in Tianjin, China. We also have offices in Shenzhen and Hong Kong.