26.5GHz Microwave Frequency Counter. Has no options. Unit sold with Keysight calibration and with 12 months warranty. Ultra-wideband, single input from 50 MHz to 26.5 GHz Simultaneous frequency and power measurement with analog peaking indicator Accuracy: +/-1 LSD +/- residual stability +/-(timebase error x frequency) GPIB and RS-232 interfaces standard Leightweight and rugged Battery optional