CUI Devices CMS-40504N-L152 Speaker, 40mm Round, 2W, 4 Ohm, 500Hz
4 cm (1.6") Full-range Speaker with Coated Paper Membrane, Neodymium Magnet, 8 Ohm
NEMA 17 Hybrid Stepper Motor, 0.49Nm Holding Torque, 1A Phase Current, Integrated 10,000 PPR Encoder
25GST2R82-216P.1 24V Coreless Brushed DC Motor, 25mm, G-Cu, Neo, 30mNm, 10kRPM, 81% Eff.