Solder Iron Tip Cleaning Sponge KK396 10 Pin Female Connector then press the transmitter key

then press the transmitter key to learn

Buzzer KY-012

These are Metal Film Resistor with a value of 330k ohm 2W and tolerance of ±5%

Sensitive to alcohol

Solder Iron Tip Cleaning Sponge KK396 10 Pin Female Connector then press the transmitter keyThis is a high quality sponge made specifically for cleaning soldering iron tips that can quickly clean the tip surface of the oxide while causing no harm to the tip of the alloy layer. To avoid oxidation of the soldering iron head, avoid overheating, remove solder residue, and keep the PCB board clean. Use this sponge to clean your soldering iron tip to extend its life. This sponge swells up when soaked in water and can hold water for a long time.