This radio kit has digital display frequency function, power-off memory function, and power-saving function The two buttons are the advance buttons. Press once to advance by 0.1MHZ. Press and hold for continuous addition and subtraction Turn off the power and then turn it on again to restore the original radio station. The digital tube will display the frequency for 5 seconds after each power-on or key press, and then the screen will be off to save power Frequency modulation range 87.5Mhz_108Mhz Power supply voltage DC4.5_5V. This product can be used for homemade radio or microcontroller learning FM range 87.5Mhz_108Mhz. Supply voltage DC4.5_5V Antenna: minimum 88mm, maximum 250mm Function: Homemade radio or microcontroller learning Note: 1. The product is shipped in parts and is not a finished product and needs to be assembled by the user. 2. Depending on the batch, the printed words on the product will be different, which does not affect use. Material: PCB+acrylic+electronic components colour: As shown Package Contents: 1 x 1/4W Resistor 4.7R 1 Self-Locking Switch (With Keycap 5mm High) 1 x FM Radio Telescopic Antenna 2 x Touch Buttons 6 x 6 x 18 1 x 1/4w Resistor 1K 10 x 1/4w Resistors 10K 1 x 1/4w Resistor 220K 1 x 4Q/3W Speaker 1 x Single Gear Potentiometer 20K (3 Feet) 4 x Transistors 9012 1 x Red And Black Connecting Cable 1 x Tea5767 Radio Module 4 x Monolithic Capacitors 104 1 x LM386 Plug-In Chip 1 x Electrolytic Capacitor 25V/10UF 1 x STC15W408S Plug-In Chip 3 x Electrolytic Capacitors 25V/100UF 1 x 8PIC Seat 1 x 3461BS Digital Tube 1 x 28PIC Seat 1 x 4P Straight Pin Header 1 x 3mm Yellow Led 1 x DC-005 Power Socket 1 x PCB Board 1 Self-Locking Switch (With Keycap 5mm High) 1 x Acrylic Plate 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.