frequency meter 1)Small size, easy mounting 2)4 or 5 digit LED display 3)high accuracy and decimal point setting Frequency meter ... ) Small size, easy mounting, 36Hx72W, 42Hx79W, 48Hx96Wmm;2) Can measure frequency, tacho and count pulse, 3 in 1, high cost effective; 3 ... ) Frequency range: 1-9999 Hz, tacho range: 60-9999 RPM, counting range: 0-9999 ...