The GW Instek GDM9061 6 1/2 Digit Dual Measurement Multimeter with 0.0035% DCV Basic Accuracy features high precision DC voltage accuracy, fast sampling rate, 12 measurement functions, and 6 mathematical functions (dB/dBm/Compare/ MX+B/Percent and 1/X). This model also includes a variety of communications interfaces (USB device/host, RS-232C, LAN, digital I/O and optional GPIB) to provide comprehensive measurement capabilities, higher speed, and accuracy. The GDM-9061 is a portable, dual-display digital multimeter suitable for a wide range of applications, such as production testing, research, and field verification.