{
 "@context": "https://schema.org",
 "@graph": [
  {
   "@type": "Product",
   "@id": "https://100electronics.com/product/esp-01s-relay-module-v4-0/#product",
   "url": "https://100electronics.com/product/esp-01s-relay-module-v4-0/",
   "name": "ESP-01S Relay Module V4.0",
   "description": "This ESP-01S Relay Module based on AI-Thinker ESP-01S WIFI module, we use the GPIO0 of ESP-01S to control the relay by low level. It’s easy to DIY your smart switch to any device by your phone anywhere with this smart relay. Specifications Operating voltage: 5VDC Communication: ESP01 or ESP 01S WiFi module Transmission distance: the maximum transmission distance is 400m (open environment, mobile phone equipped with WiFi module) Size(LxW): 38x26mm Tutorial Click Here This product was updated from V1.0 to V4.0 on 30/09/2020 More Information Same Spec Items A-2194, A-4366 SKU A-4234 Manufacturer 100 Electronics MPN ESP-01S Relay Module V4.0 Can be used with -",
   "image": [
    "https://100electronics.com/wp-content/uploads/2025/11/4234.jpg",
    "https://100electronics.com/wp-content/uploads/2025/11/2022-12-09_9-52-25.jpg"
   ],
   "category": "PCBs - Breakout Boards - DIY Kits",
   "offers": {
    "@type": "Offer",
    "price": "0.70",
    "priceCurrency": "USD",
    "availability": "https://schema.org/InStock",
    "itemCondition": "https://schema.org/NewCondition",
    "url": "https://100electronics.com/product/esp-01s-relay-module-v4-0/"
   }
  },
  {
   "@type": "FAQPage",
   "@id": "https://100electronics.com/product/esp-01s-relay-module-v4-0/#faq",
   "mainEntity": [
    {
     "@type": "Question",
     "name": "How much does ESP-01S Relay Module V4.0 cost?",
     "acceptedAnswer": {
      "@type": "Answer",
      "text": "ESP-01S Relay Module V4.0 is priced at 0.70 USD."
     }
    }
   ]
  }
 ]
}