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Check the listing for details. 65MHz Frequency Meter, 6-Digit LED, TCVCXO Reference, High Resistance Input. Condition: New. Listed at 23.49 USD. Excellent Display Effect: It uses an LED chip digital tube display, which has high brightness and strong resistance to external interference. Input impedance: High resistance. 1 x Frequency Counter. Display digits: Six common anode LED display, the highest displays six digits.