⭕ This is a Fluke 5820A 5-Channel, 2.1Ghz Oscilloscope Calibrator. This unit comes calibrated. Portable and rugged enough for on-site applications. The 5820A is compact, portable and rugged. On the bench, its small footprint leaves you plenty of workspace. Outside the lab, its easy to carry, without the need for extra accessories like pulse heads. Available for pick-up/shipping. For automated applications, the five-channel option allows you to calibrate up to four oscilloscope channels, with trigger, simultaneously without changing cables. This allows you to perform fast, hands-free automated calibrations with documented procedures and results while freeing the operator to complete other work - a dramatic productivity improvement. Plus, the external trigger allows you to work with tough-to-capture signals like fast edges simultaneously.