Check the listing for details. Soldering Practice Board, Electronics Kit PCB Board DIY 8ch Digital-Responder,6V. Condition: New. Listed at 13.96 USD. This 8-channel digital responder-machine soldering kit electronics practice board is a teaching kit for people who want to improve the welding skills.8-channel answering can be performed at the same time.Specification:Product:Electronic Production Teaching KitApplicable voltage: 6VPCB board size: 80*60*1.5mm/3.15*2.36*0.06inchEffect: 8-channel digital responder-machinePacking List: 1 Set 8-channel digital responder-machine DIY Electronic Experiments Teaching Kit(1Set Packing List: 1 * resistance 100k, 8 * 10k, 8 * 300 ohms, 1 * 10uf electrolytic capacitor, 1 * 47uf electrolytic capacitor * 1, 1 * 103 capacitor, 2 * 104 capacitor, 18 * diode, 1 * integrated circuit CD4511, 1 * NE555IC, 14 * 0805 LED red, 1 * buzzer, 9 * key instantaneous, 1 * circuit board , 1*S9013 )Advantage :1.