Features: Frequency range: 1Hz-75MHz (in fact, it can work up to 78MHz). A four- or five-digit resolution display (for example, x.KHz xxx, x.xxx.MHz or xx.xxMHz). Automatic switching range with different gate times. Add or subtract a programmable frequency shift. Input impedance: 1.1 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 9V input. Optional (configurable) power saving mode that automatically turns off the display if the frequency does not change significantly within 15 seconds. Specifications: Type: DIY kit Frequency range: 1Hz-75MHz Input impedance 50MHz: 1.1M, parallel with resolution about 10PF: Max. 1Hz Current consumption: 50mA with 7 to 9V input jack type socket Input: BNC Display: Digital LED display PCB size: 80x5 8mm/3.15x2.28" Quantity: 1 Set Note: Please allow 1-3mm error due to manual measurement. Pls make sure you don't mind before bidding because of the difference between different monitors, the picture may not reflect the actual color of the thing. Thank you! Non-retail Package Contents: 1 Set x Frequency Meter Kit DIY Material List: Resistors (0.25W, 1%): 8 x R1-R8 1k 2 x R9, R15 10k 1 x R10 100k 1 x R11 1 M 1 x R12 220 1 x R13 56k* according to different batches of C3355, the resistance can change the capacitors 1 x R14 470: 1 x C1 470n polypropylene 1 x C2 100p ceramic 2 x C3 C5 100n polypropylene 1 x C4 47u electrolytic 2 x C6, c8 10u electrolytic 1 x C7 6-40p variable 2 x C14, C15 22p ceramic ICs: 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 miscellaneous: 1 x J1 SIL socket and header 1 x J2 BNC socket 1 x J3 DC_CZ_ZM DC socket adapter 1 x switch SW1 AN_SW button 1 x switch SW2 SW2X2 button 1x1 crystal 20MHz 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