The Kenwood DG-5 external digital display provides 100 Hz accuracy to your TS-520SE. The DG-5 can also be used as a conventional frequency counter from 100 Hz to 40 MHz. Gate time is 0.1 seconds. Maximum input voltage is 200 VDC (DC + Peak), 5 V rms. There is a dimmer switch on the rear panel.
Physical: 6.4 x 1.7 x 10.7 inches 2.9 lbs. (167x43x268mm 1.3kg).