... . 4mm safety socket connection. Customization allows. Dimensions100x68x48mmBasic unitsF3-001Resistor4.7Ω,12Ω,39Ω,2WF3-016Speaker8Ω,0.3WF3-002Capacitor470pF,4700pF 47000pF,63VF3-017Potentiometer1K ... voltage meter 0~30VAccuracy 2.5%F3-015Buzzer3~7V F3-018 DIODE BOX FOR TBF100 FRAME