RS485 ESP32 Din Rail Mounting Expansion Board DC 7-30V Power Input 5V 3.3V Outpu S$ 12.08 to S$ 16.10
DC 7-27V 64CH Multifunction Modbus DI-DO Module Isolate Input Darlington Output S$ 81.61 to S$ 306.82
With Acrylic Shell 7.83HZ 0.01H-100KH Schumann Resonance Pulse Sine Wave Generat S$ 28.11 to S$ 38.51
3.5MM Male to Male Aux Audio Cable Gold Plating Copper Core Wire For 7.83HZ Schu S$ 26.62 to S$ 60.08