* Multiple parameter measurement: Ra, Rz. * Highly sophisticated inductance sensor. * Built-in lithium ion rechargeable battery and control circuit with high capacity. * Small in size, light in weight and easy to use. * Manual or automatic shut down. * Metric /Imperial Conversion. * Use “USB data output” and “RS-232 data output” to connect with PC. * Provide “Bluetooth ™ data output” choice.