We are offering digital multimeterpicotest m3500arc 6 1/2 digits standard dmm with built in rs232 card the m3500a usb digital multimeter/data acquisition system has a high accuracy (35ppm), 6 1/2 -digit resolution and is ideal for critical measurements. It features 11 measurement functions and 8 math functions to easily accommodate the most commonly measured parameters. All accessories, such as usb cable, probes, and software, are included with the m3500a. With its unique combination of high precision and low total cost of ownership, the m3500a is an unbeatable value for r&d engineers, test engineers, scientists, and students making basic precision measurements on the bench and in system applications. Like all picotest products, its backed by our 3 year warranty and 30 day refund policy. key features and specifications:1. High precision 6.5-digit dmm for critical measurements at a 5.5-digit price2. 11 measurement functions cover most commonly measured parameters3. Data acquisition capabilities with an added 10 or 20 channel card (optional)4. Fully specified accuracies on all functions for iso-compliant results5. Tmc compliant usb 2.0 interface for use with scpi test programs6. Included pc software utilities for graphing and data sharing in both microsoft word and excel7. Rugged construction for durability in bench/portable applications8. Selectable front/rear inputs facilitate bench or rack use9. Includes all accessories, such as startup software, usb cable, power cable, and safety test leads, for lowest total cost. 10. Ul listed; ce compliant