![Relay Module with Optocoupler 1 Channel High Low Level Trigger Relay Module Board AC 250V/10A DC 30V/10A (5V): Amazon.com: Industrial & Scientific Relay Module with Optocoupler 1 Channel High Low Level Trigger Relay Module Board AC 250V/10A DC 30V/10A (5V): Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/S/aplus-media-library-service-media/77ad6452-f6cb-46c3-8bff-ff8548c5c0c0.__CR0,0,970,600_PT0_SX970_V1___.jpg)
Relay Module with Optocoupler 1 Channel High Low Level Trigger Relay Module Board AC 250V/10A DC 30V/10A (5V): Amazon.com: Industrial & Scientific
![1PCS 3V 3.3V 2 Channel Relay Module with Lamp Low Level Trigger 2Channel 2Way Relay Module: Amazon.com: Industrial & Scientific 1PCS 3V 3.3V 2 Channel Relay Module with Lamp Low Level Trigger 2Channel 2Way Relay Module: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/517ykoKKpgL._AC_SY1000_.jpg)
1PCS 3V 3.3V 2 Channel Relay Module with Lamp Low Level Trigger 2Channel 2Way Relay Module: Amazon.com: Industrial & Scientific
![Amazon.com: StarTech.com 2 Port Flush Mount ExpressCard 54mm SuperSpeed USB 3.0 Card Adapter with UASP - Dual Port Laptop ExpressCard USB 3 Controller (ECUSB3S254F) : Everything Else Amazon.com: StarTech.com 2 Port Flush Mount ExpressCard 54mm SuperSpeed USB 3.0 Card Adapter with UASP - Dual Port Laptop ExpressCard USB 3 Controller (ECUSB3S254F) : Everything Else](https://m.media-amazon.com/images/I/512pTAqymWL._AC_.jpg)
Amazon.com: StarTech.com 2 Port Flush Mount ExpressCard 54mm SuperSpeed USB 3.0 Card Adapter with UASP - Dual Port Laptop ExpressCard USB 3 Controller (ECUSB3S254F) : Everything Else
![Amazon.com: Lystin 8 Channel DC 5V DC 230V Relay Module Control Board with Optocoupler for UNO R3 MEGA 2560 1280 DSP ARM PIC AVR TTL Logic STM32 Raspberry Pi : Electronics Amazon.com: Lystin 8 Channel DC 5V DC 230V Relay Module Control Board with Optocoupler for UNO R3 MEGA 2560 1280 DSP ARM PIC AVR TTL Logic STM32 Raspberry Pi : Electronics](https://m.media-amazon.com/images/I/61QzQ-lVUNL._AC_SY580_.jpg)
Amazon.com: Lystin 8 Channel DC 5V DC 230V Relay Module Control Board with Optocoupler for UNO R3 MEGA 2560 1280 DSP ARM PIC AVR TTL Logic STM32 Raspberry Pi : Electronics
![Amazon.com: USB Relay Module USB Intelligent Switch Control MCU PC USB Smart Control Switch Jog Self-Locking : Electronics Amazon.com: USB Relay Module USB Intelligent Switch Control MCU PC USB Smart Control Switch Jog Self-Locking : Electronics](https://m.media-amazon.com/images/I/31Rthe6QMwL._AC_SY1000_.jpg)
Amazon.com: USB Relay Module USB Intelligent Switch Control MCU PC USB Smart Control Switch Jog Self-Locking : Electronics
![Amazon.com: USB Relay Module USB Intelligent Switch Control MCU PC USB Smart Control Switch Jog Self-Locking : Electronics Amazon.com: USB Relay Module USB Intelligent Switch Control MCU PC USB Smart Control Switch Jog Self-Locking : Electronics](https://m.media-amazon.com/images/I/41bddB27hlL._AC_SY1000_.jpg)
Amazon.com: USB Relay Module USB Intelligent Switch Control MCU PC USB Smart Control Switch Jog Self-Locking : Electronics
![Relay Module with Optocoupler 1 Channel High Low Level Trigger Relay Module Board AC 250V/10A DC 30V/10A (5V): Amazon.com: Industrial & Scientific Relay Module with Optocoupler 1 Channel High Low Level Trigger Relay Module Board AC 250V/10A DC 30V/10A (5V): Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/41u2w4Yml6L._AC_SY580_.jpg)
Relay Module with Optocoupler 1 Channel High Low Level Trigger Relay Module Board AC 250V/10A DC 30V/10A (5V): Amazon.com: Industrial & Scientific
![Amazon.com: ARCELI 5PCS KY-019 5V One Channel Relay Module Board Shield for PIC AVR DSP ARM for Relay : Electronics Amazon.com: ARCELI 5PCS KY-019 5V One Channel Relay Module Board Shield for PIC AVR DSP ARM for Relay : Electronics](https://m.media-amazon.com/images/I/41R+oaeJCrL._AC_SY350_.jpg)
Amazon.com: ARCELI 5PCS KY-019 5V One Channel Relay Module Board Shield for PIC AVR DSP ARM for Relay : Electronics
![Amazon.com: DSD TECH SH-BT01C Bluetooth Relay V2 Support Timer and Security Code for iOS and Android : Electronics Amazon.com: DSD TECH SH-BT01C Bluetooth Relay V2 Support Timer and Security Code for iOS and Android : Electronics](https://images-na.ssl-images-amazon.com/images/I/51lDfmuBuZL._AC_UL210_SR210,210_.jpg)
Amazon.com: DSD TECH SH-BT01C Bluetooth Relay V2 Support Timer and Security Code for iOS and Android : Electronics
![Amazon.com: USB Relay Module USB Intelligent Switch Control MCU PC USB Smart Control Switch Jog Self-Locking : Electronics Amazon.com: USB Relay Module USB Intelligent Switch Control MCU PC USB Smart Control Switch Jog Self-Locking : Electronics](https://m.media-amazon.com/images/I/51U5rKNwy0L.jpg)
Amazon.com: USB Relay Module USB Intelligent Switch Control MCU PC USB Smart Control Switch Jog Self-Locking : Electronics
![Amazon.com: Dual 2 Port USB 3.0 ExpressCard Adapter 5Gbps USB HUB ExpressCard 54mm Slot Express Card PCMCIA Converter for Laptop Notebook PC : Electronics Amazon.com: Dual 2 Port USB 3.0 ExpressCard Adapter 5Gbps USB HUB ExpressCard 54mm Slot Express Card PCMCIA Converter for Laptop Notebook PC : Electronics](https://m.media-amazon.com/images/I/61S8AUo1gPL.jpg)
Amazon.com: Dual 2 Port USB 3.0 ExpressCard Adapter 5Gbps USB HUB ExpressCard 54mm Slot Express Card PCMCIA Converter for Laptop Notebook PC : Electronics
![Amazon.com: USB Relay Module USB Intelligent Switch Control MCU PC USB Smart Control Switch Jog Self-Locking : Electronics Amazon.com: USB Relay Module USB Intelligent Switch Control MCU PC USB Smart Control Switch Jog Self-Locking : Electronics](https://m.media-amazon.com/images/I/31e-Jqv5RiL._AC_SY350_.jpg)
Amazon.com: USB Relay Module USB Intelligent Switch Control MCU PC USB Smart Control Switch Jog Self-Locking : Electronics
![Amazon.com: Mini PCIe WWAN to USB Adapter Card with SIM Slot WWAN/3G/LTE Module Tester Converter Wireless Wide Area Network Card : Electronics Amazon.com: Mini PCIe WWAN to USB Adapter Card with SIM Slot WWAN/3G/LTE Module Tester Converter Wireless Wide Area Network Card : Electronics](https://m.media-amazon.com/images/I/41ZQpPJYVWL._AC_SY350_.jpg)
Amazon.com: Mini PCIe WWAN to USB Adapter Card with SIM Slot WWAN/3G/LTE Module Tester Converter Wireless Wide Area Network Card : Electronics
![Amazon.com: Baomain AC Contactor CT1-25 110V 25A 2 Pole Universal Circuit Control : Industrial & Scientific Amazon.com: Baomain AC Contactor CT1-25 110V 25A 2 Pole Universal Circuit Control : Industrial & Scientific](https://m.media-amazon.com/images/I/3105FEyX0+L._AC_SY580_.jpg)
Amazon.com: Baomain AC Contactor CT1-25 110V 25A 2 Pole Universal Circuit Control : Industrial & Scientific
![Gosund Smart WLAN Power Strip With USB, Independent Switch, Multi-Plug With Alexa and Google Home Voice Control, Power Consumption Measurement, Timer and App Control, 5 Feet, WiFi 2.4 GHz Only: Buy Online Gosund Smart WLAN Power Strip With USB, Independent Switch, Multi-Plug With Alexa and Google Home Voice Control, Power Consumption Measurement, Timer and App Control, 5 Feet, WiFi 2.4 GHz Only: Buy Online](https://m.media-amazon.com/images/I/514I8LLDlQL.jpg)
Gosund Smart WLAN Power Strip With USB, Independent Switch, Multi-Plug With Alexa and Google Home Voice Control, Power Consumption Measurement, Timer and App Control, 5 Feet, WiFi 2.4 GHz Only: Buy Online
![Amazon.com: Lystin 8 Channel DC 5V DC 230V Relay Module Control Board with Optocoupler for UNO R3 MEGA 2560 1280 DSP ARM PIC AVR TTL Logic STM32 Raspberry Pi : Electronics Amazon.com: Lystin 8 Channel DC 5V DC 230V Relay Module Control Board with Optocoupler for UNO R3 MEGA 2560 1280 DSP ARM PIC AVR TTL Logic STM32 Raspberry Pi : Electronics](https://m.media-amazon.com/images/I/51VCbvDbNPL._AC_SY350_.jpg)
Amazon.com: Lystin 8 Channel DC 5V DC 230V Relay Module Control Board with Optocoupler for UNO R3 MEGA 2560 1280 DSP ARM PIC AVR TTL Logic STM32 Raspberry Pi : Electronics
![Amazon.com: Lystin 8 Channel DC 5V DC 230V Relay Module Control Board with Optocoupler for UNO R3 MEGA 2560 1280 DSP ARM PIC AVR TTL Logic STM32 Raspberry Pi : Electronics Amazon.com: Lystin 8 Channel DC 5V DC 230V Relay Module Control Board with Optocoupler for UNO R3 MEGA 2560 1280 DSP ARM PIC AVR TTL Logic STM32 Raspberry Pi : Electronics](https://m.media-amazon.com/images/I/41Lg92V4VSL._AC_SY580_.jpg)
Amazon.com: Lystin 8 Channel DC 5V DC 230V Relay Module Control Board with Optocoupler for UNO R3 MEGA 2560 1280 DSP ARM PIC AVR TTL Logic STM32 Raspberry Pi : Electronics
![Shelly 1L Relay Switch, WiFi Smart Home Automation Compatible With Alexa & Google Home, iOS Android, No Hub and No Neutral Required, Wireless Light Switch, Smart Appliances Gadgets MQTT Enabled Device: Amazon.com: Shelly 1L Relay Switch, WiFi Smart Home Automation Compatible With Alexa & Google Home, iOS Android, No Hub and No Neutral Required, Wireless Light Switch, Smart Appliances Gadgets MQTT Enabled Device: Amazon.com:](https://m.media-amazon.com/images/I/31O0A7hl++S._AC_SY1000_.jpg)
Shelly 1L Relay Switch, WiFi Smart Home Automation Compatible With Alexa & Google Home, iOS Android, No Hub and No Neutral Required, Wireless Light Switch, Smart Appliances Gadgets MQTT Enabled Device: Amazon.com:
![Amazon.com: USB Relay Module USB Intelligent Switch Control MCU PC USB Smart Control Switch Jog Self-Locking : Electronics Amazon.com: USB Relay Module USB Intelligent Switch Control MCU PC USB Smart Control Switch Jog Self-Locking : Electronics](https://m.media-amazon.com/images/I/61iquvI2zVL.jpg)
Amazon.com: USB Relay Module USB Intelligent Switch Control MCU PC USB Smart Control Switch Jog Self-Locking : Electronics
![2PCS Relay Module 1 Channel DC 5V Flip-Flop Latch Relay Bistable Self-Locking Switch Low Pulse Trigger Board for Controlling DC Motors: Amazon.com: Tools & Home Improvement 2PCS Relay Module 1 Channel DC 5V Flip-Flop Latch Relay Bistable Self-Locking Switch Low Pulse Trigger Board for Controlling DC Motors: Amazon.com: Tools & Home Improvement](https://m.media-amazon.com/images/I/412vFj0KElL._AC_SY350_.jpg)