1WIDE USAGE: VFO variable frequency oscillator can be used for self made equipment, such as superheterodyne receivers, DCR, SDR, or Ham QRP transceivers. 2HIGH ACCURACY: The working range is 10kHz to 220MHz, 0.5PPM Tcxo clock makes frequency more accurate, the tuning steps are 1Hz, 10Hz, 1kHz, 5kHz, 10kHz, 1MHz. 3MULTI FUNCTION: With generator function mode. You can set start frequency, end frequency, sweep step size. This VFO also has a bar chart indicator for signal strength (S Meter) and 20 Band preset. Can also be used as an RF or clock generator. 40.96 INCH DISPLAY: Using the universal 0.96 inch 128x64 I2C organic light emitting diode display and Si5351 module, can be connected to the display or Si5351 with just 2 cables. 5I2C TRANSMISSION: Adopting I2C data transmission, with high stability and accuracy. The intermediate frequency (IF) offset (+ or ) is adjustable.