Features: Frequency range: 1Hz-75MHz (in fact, it can work up to 78MHz). Four-digit or five-digit display resolution (for example, x.KHz xxx, x.xxx.MHz, or xx.xxMHz). Automatic switching range with different gate times. addition or subtraction of programmable frequency offset. Input impedance: 1.1 for M, parallel to about 10pF. Input sensitivity: Typically less than 20mV RMS from 1Hz-100KHz, rising to 35mV at 20MHz and 75mV at 50MHz (150mV at 78MHz). Current consumption: 50mA with 7 to 9 V input. Optional (configurable) power-saving mode that automatically shuts off the display if the frequency does not change significantly within 15 s. Specifications: Type: DIY Kit Frequency Range: 1Hz-75MHz 50MHz Input Impedance: 1.1M, Parallel with about 10PF Resolution: Max. 1Hz Current Consumption: 50mA with 7 to 9V Input Jack Socket of Input: BNC Display: Digital LED Display PCB Size: 80x58mm/3.15x2.28" Quantity: 1 Set Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! No Retail Package Package Contents: 1 Set x Frequency Meter DIY Kit List Of Materials: Resistors (0.25 for W , 1%): 8 x R1-R8 1 k 2 x R9, R15 10 k 1 x R10 100 k 1 x R11 1 for M 1 x R12 220 1 x R13 56 k * according to the different batches of C3355, the resistance can change 1 x R14 470 Capacitors: 1 x C1 470n Polypropylene 1 x C2 100 p Ceramics 2 x C3 C5 100n Polypropylene 1 x C4 47u Electrolytic 2 x C6, C8 10u Electrolytic 1 x C7 6-40 p Variable 2 x C14, C15 22 p Ceramic Integrated Circuits: 1 x U1 PIC16F628A (Programmed) + 18pin IC socket 1 x U2 LM1117-5V SMD Transistors 1 x Q1 C945 1 x Q2 J310 1 x Q3 C3355 Diodes: 6 x D1-D6 1N4148 1 x D7 1N5819 Various: 1 x J1 SIL Socket & header 16Pin 1 x J2 BNC socket 1 x J3 DC_CZ_ZM socket adapter DC 1 x switch button SW1 AN_SW 1 x switch button SW2 SW2X2 1 x 1 Crystal 20 MHz 2 x SG1 7-segment 2-digit display common cathode Red 1 x SG3 7-segment 1-digit display common cathode Red 1 x PCB Main 1 x PCB display 2 x Copper pillar + + Spring screw Washer