{"product_id":"4g-gsm-access-controller-sms-remote-gate-door-switch","title":"4G GSM Access Controller – Remote SMS Gate \u0026 Door Switch","description":"\n\u003ch2\u003e4G GSM Access Controller – Control Gates, Doors \u0026amp; Equipment Remotely\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eG202 4G GSM Access Controller\u003c\/strong\u003e is a compact, reliable remote switch that lets authorized users open gates, doors, barriers, and control equipment with a simple free phone call or SMS command — no internet connection required. Ideal for garages, warehouses, hotels, car parking systems, and any location where remote ON\/OFF switching is needed.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e⚠️ Important Notice:\u003c\/strong\u003e A 4G SIM card that supports both \u003cstrong\u003eVoLTE and Data functions\u003c\/strong\u003e is required for 4G operation.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFree Call Activation:\u003c\/strong\u003e Authorized users simply dial the device's SIM number — the controller rejects the call (no charge) and triggers the relay action instantly.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSMS Command Control:\u003c\/strong\u003e Send SMS commands to remotely switch equipment ON or OFF from anywhere in the world.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Compatibility:\u003c\/strong\u003e Works with doors, gates, barriers, car parking systems, garage doors, warehouse access points, and more.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Network Support:\u003c\/strong\u003e Operates on both 2G GSM and 4G LTE networks for maximum coverage flexibility.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBroad Voltage Range:\u003c\/strong\u003e Accepts DC 9V–36V input, making it easy to integrate into various existing systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWired Switch Support:\u003c\/strong\u003e Supports a physical wired switch in addition to remote control.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Lightweight:\u003c\/strong\u003e Dimensions of 96.5 × 50 × 31.5 mm and weighing only 88g — easy to install in tight spaces.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable ABS Housing:\u003c\/strong\u003e Light gray ABS casing built for long-term indoor and light outdoor use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRated Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 9V–36V \/ 1A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWorking Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-10°C to +60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStorage Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-20°C to +60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRelative Humidity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10–90%, No Condensation\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e2G Frequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e850 \/ 900 \/ 1800 \/ 1900 MHz (GSM)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e4G Bands\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eB1 \/ B2 \/ B3 \/ B4 \/ B5 \/ B7 \/ B8 \/ B20 \/ B28 \/ B38 \/ B40 \/ B41 \/ B66\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCommunication Protocol\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGSM \/ 4G Phase 2\/2+ (includes data service)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Relay Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3A \/ 240V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSIM Card Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNano SIM, 3V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAntenna\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e50Ω SMA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e96.5 × 50 × 31.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNet Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e88g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLight Gray\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eABS\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × G202 4G GSM Access Controller\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eNote: SIM card and external antenna not included. Color may vary slightly due to display settings. Measurement tolerance is ±1–3 cm.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eYou May Also Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10cm-wireless-led-motion-sensor-night-light-type-c-rechargeable-cabinet-wardrobe-lamp-for-staircase-backlight-kitchen-lighting\"\u003eWireless LED Motion Sensor Night Light – Type-C Rechargeable\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-piece-storage-tray-360-degree-refrigerator-storage-rotating-tray-used-for-kitchen-spice-jars-and-sundry-storage-turntable-1\"\u003e360-Degree Rotating Storage Tray for Kitchen \u0026amp; Home\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/hand-power-tools\" target=\"_blank\" rel=\"noopener\"\u003eOSHA guidance on hand and power tools\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What type of SIM card does the G202 4G GSM Access Controller require?\u003c\/h4\u003e\n\u003cp\u003eA: The G202 requires a \u003cstrong\u003eNano SIM card (3V)\u003c\/strong\u003e. For 4G operation, the SIM card must support both \u003cstrong\u003eVoLTE and Data functions\u003c\/strong\u003e. A standard 2G GSM SIM card can also be used if 4G is not needed.\u003c\/p\u003e\n\u003ch4\u003eQ: Does activating the gate or door via phone call cost anything?\u003c\/h4\u003e\n\u003cp\u003eA: No. The GSM Access Controller works by receiving a call from an authorized number and then \u003cstrong\u003erejecting it immediately\u003c\/strong\u003e — triggering the relay action. The call is never connected, so there are no call charges to the caller.\u003c\/p\u003e\n\u003ch4\u003eQ: What kinds of devices or locations can this controller be used with?\u003c\/h4\u003e\n\u003cp\u003eA: The G202 GSM Access Controller is versatile and can be used to control \u003cstrong\u003egates, doors, barriers, garage door openers, car parking systems, warehouse access points, hotel entrances\u003c\/strong\u003e, and any equipment that can be operated via an ON\/OFF relay switch within the relay's rated capacity (3A \/ 240V AC).\u003c\/p\u003e\n\u003ch4\u003eQ: What is the input voltage range for installation?\u003c\/h4\u003e\n\u003cp\u003eA: The controller accepts a wide \u003cstrong\u003eDC 9V to 36V at 1A\u003c\/strong\u003e input, making it compatible with a broad range of power supplies and existing access control infrastructure.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What type of SIM card does the G202 4G GSM Access Controller require?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The G202 requires a Nano SIM card (3V). For 4G operation, the SIM card must support both VoLTE and Data functions. 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