The solder learning kit has proper circuit design with led indicator easy to check your soldering result them will be a flashing LED light after soldered and powered with 3-12V very interesting effect. PCB Board with clear components name marked enable the user easy to joint the components to the corresponding positions. Manufacturered by IS. This DIY training suite is reusable design you can repeat solder and dissolder process with this kit save your money perfect for SMD components soldering skill training or competition. Delivery by USPS with tracking information in around 7 to 17 days usually. Provide the English instruction by emails if you do not receive it please send us a message or email we will resend it to you without delay. Icstation SMD SMT components solder practice kits include the NPN LED resistor capacitor etc. 129pcs components and 313 soldering joints for your soldering training.