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3pcs 1 Channel 12V Relay Module with Optocoupler Isolation Relay High Level Trigger For Arduino

5V Charging UPS Uninterrupted Protection Integrated Board 18650 Lithium Battery Boost Module With Battery Holder

5pcs DC-DC 8-55V to 5V 2A Step Down Power Supply Module Buck Regulated Board For Arduino

5pcs KSD9700 250V 5A 45℃ Plastic Thermostatic Temperature Sensor Switch NC

3pcs JHE-KC605 DC-DC Voltage Display Step Down USB Charging Module 7-30V QC3.0 USB Mobile Phone Charger