... conveniently. Mainly features1. Handheld, lightweight and convenience for carrying 2. Most advanced technology of double-color & material integrative ... 64, 128, 256km Sampling Resolution 0.25, 0.5, 1, 2, 4, 8, 16mPulse width10, 30, 80, 160, 320, ... 01dBLinearity0.05dB/dBMemory capacity800 tracesGroup refractive index setting1.00000-2.00000Display Color LCD(touch screen)InterfaceUSB, Min-USBVFL650nm± ...