Keysight technologies u2741a usb modular digital multimeter keysight technologies u2741a opt 902 abd the u2741a usb modular digital multimeter from keysight technologies provides a broad range of measurement functions including temperature and frequency using a high speed usb 2 0 interface for easy connection to a pc or other device the u2741a allows accurate measurements with up to 100 values a second and a resolution of 5 5 digits keysight technologies u2741a usb modular digital multi