PEN4D > AGEN TOTO 4D AKURAT LANGSUNG JEPE

pen4dSCRIB3D P1 3D Printing Pen with Display - Includes 3D Pen, 3 Starter Colors of PLA Filament, Stencil Book + Project Guide, and ChargerThe Pen4DD is from the early mains-valve era. As a double diode output pentode it was to perform the function of snal detection, AGC detection, and audio output.