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A highly compact option for controlling one circuit up to 8A. It typically costs between $16.99 $8.50 at Shelly USA or $10.19 at Best Buy . Shelly 1PM Gen4 Smart Relay Switch Best Buy& more Go to product viewer dialog for this item.

What and amperage are you looking to switch for your specific project? buy relay switch

Supports higher loads up to 16A and includes built-in power monitoring. Available for $27.99 at Walmart . Shelly 2PM Gen4 Smart Relay Switch 2-Channel Shelly USA& more Go to product viewer dialog for this item. A highly compact option for controlling one circuit up to 8A

A stackable shield for Arduino that adds four independently controlled 2A relays. Available for $28.40 at DigiKey or $32.65 at RobotShop . 1 Channel Relay Module 5V DC Goliath Automation & Robotics& more Go to product viewer dialog for this item. What and amperage are you looking to switch

These allow you to automate lights or appliances via Wi-Fi or Bluetooth without a hub. They are designed to fit into standard wall boxes behind your existing switches. Shelly Wi-Fi 1 Mini Gen3 Smart Relay Best Buy& more Go to product viewer dialog for this item.

A budget-friendly pack of two relays with harness sockets for $12.49 at Walmart . Electronics & Hobbyist Relays

A 5-pin SPDT relay kit designed for wet environments like boats or off-road vehicles. Sold for $4.29 at TrueMods . Unique Bargains DC 12V 40A SPST Auto Car Relay Walmart - Tasharina Corp Go to product viewer dialog for this item.