1. It uses STC8H1K17 microcontroller as the main control, built-in PLL local oscillator, covering 3-23MHz, with built-in frequency indication circuit (using 7-segment digital tube, display unit is 1KHz, the photo has color difference, it is actually red), and stepping supports automatic . 2. The kit adopts TA2003 mixer + TA7613 medium/low amplifier solution, superheterodyne architecture, intermediate frequency 10.7MHz. 3. code of this store, onboard digital volume potentiometer, supports automatic configuration saving, and supports adjustment of intermediate frequency and crystal frequency. Supply Voltage: 12V (It Is Recommended To Use Linear Regulated Power Supply Or Battery) Current: 110MA Tuning Range: 3-23MHz Mode: AM Step:1KHz/10KHz/100KHz Tips: The Product May Be Updated Constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use The Parts Are Shipped Separately, And Welding And Debugging Need To Be Completed By Yourself Colour:Photo Color Material:PCB Package Contents: 1x R10 Shortwave Receiver DIY Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.