Amp - Electronic DIY Kit Highlights Generic Brand Electronic DIY Kit Description: The pad is widened and treated with tin, making soldering easy, and the solder pads are resistant to detachment after multiple uses. It is not prone to bending (referring to bending caused by non-human conditions), and defective boards may warp over time and with environmental changes. The impedance is more stable and reliable; the pin header port serves as an external code port (can be directly connected to the I/O port of the MCU). Toggle switches act as manual code switches. Working voltage: 4.5-5V PCB size: approximately 48 x 41mm Control mode: manual coding + external coding Package includes: 1 piece PCB board 4 pieces 12D07 toggle switch 1 piece 9561 Music IC 1 piece Passive buzzer 2 pieces 14P IC Block 1 piece CD4011 1 piece CD4066 1 piece 5P pin header 1 piece 8050 transistor 1 piece 104 ceramic capacitor 2 pieces 1N4148 diode 1 piece 1N4007 diode 6 pieces resistor 150K 2 pieces 270K 1 piece 62K resistor 1 piece 620K resistor