---
product_id: 791330430
title: "KT-G3-A USA 4G GSM AUTO Relay Switch 12V Remote Control Box Wireless Gate Opener 2CH Output HOG Trap System 30A Relay Contact(for AT&T and T-Mobile)"
brand: "kiaotime"
price: "€ 15.69"
currency: EUR
in_stock: false
url: https://www.desertcart.hr/products/791330430-kt-g3-a-usa-4g-gsm-auto-relay-switch-12v
store_origin: HR
region: Croatia
---

# Phone call & SMS remote control 4G LTE multi-band USA compatible 30A high-power dual relay output KT-G3-A USA 4G GSM AUTO Relay Switch 12V Remote Control Box Wireless Gate Opener 2CH Output HOG Trap System 30A Relay Contact(for AT&T and T-Mobile)

**Brand:** kiaotime
**Price:** € 15.69
**Availability:** ❌ Out of Stock

## Summary

> 🚀 Unlock limitless remote control power—anywhere, anytime!

## Quick Answers

- **What is this?** KT-G3-A USA 4G GSM AUTO Relay Switch 12V Remote Control Box Wireless Gate Opener 2CH Output HOG Trap System 30A Relay Contact(for AT&T and T-Mobile) by kiaotime
- **How much does it cost?** € 15.69 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/791330430-kt-g3-a-usa-4g-gsm-auto-relay-switch-12v)

## Best For

- kiaotime enthusiasts

## Why This Product

- Trusted kiaotime brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Real-Time SMS Feedback:** Get instant SMS confirmations ensuring your commands were received and executed flawlessly.
- • **Powerful 30A Dual Relay:** Control heavy-duty devices like gates, hog traps, and heaters with robust 30A relay contacts.
- • **Zero-Minute Phone Control:** Activate switches via caller ID recognition—no call charges, no answered calls, just instant action.
- • **Unmatched USA 4G Compatibility:** Seamlessly works with AT&T & T-Mobile networks for reliable nationwide control.
- • **Flexible Multi-Platform Programming:** Configure remotely via Android app, SMS, Windows PC, or optional WiFi hotspot for ultimate convenience.

## Overview

The KT-G3-A USA 4G GSM Auto Relay Switch is a professional-grade, dual-channel 30A relay controller designed for remote operation over AT&T and T-Mobile 4G/3G networks. It enables wireless control of gates, hog traps, lighting, and more via phone calls or SMS without using call minutes. Featuring multi-platform programming options and real-time SMS feedback, this compact, wall-mountable device ensures reliable, high-power switching with nationwide coverage.

## Description

KT-G3 Upgrade Features on the basis of KT-G21> Upgrade to 30A high power relay contact2> Use big relay connection screws for easy wiring3> WiFi and RF433Mhz features are optional to save relay working powerDescription4G Relay Switch works on the basis of 4G/3G network, so it requires a prepaid pay-as-you-go 4G SIM card from your cellular provider, No minutes are used as it doesn't actually answer the calls - it recognize caller ID and then reject your phone call to turn on the switch automatically.Its working way as same as your home wall mount manual press lights switch, the only difference is we changed manual press working way to Cell Phone wireless remote control. So the range of this relay switch is truly unlimited, You can remote control your home appliances anytime anywhere in the world!Applications:HOG TRAP systemAircraft engine heaterHome or office lighting controlGSM gate openerSpecification:Working Voltage: DC 12-24V@1-2AMaterial: ABSOutput: 2 channel relay, NO/NC,COMRelay Contact: 30A 250VAC/30VDCPower Consumption: Standby status:60mA@12V, Working status:100mA@12VMemory: Relay memory after AC power outageControl way: Phone Call/SMS/Timer control/Ralated working Working Humidity: >65%Working Temperature: -25 - +55℃WiFi LAN hotspot access: OptionalRadio Frequency: 433.92MHZ (for wireless keyfob,optional)Relay device dimension:7"(L) x 4.75"(W) x 2.25"(H)Package Dimension:8.75"(L) x 6.5"(W) x 2.75"(H)4G Module Bands: FDD-LTE:B2/ B4/ B12, 3G-WCDMA:B2/B4/B5 Compatible providers: USA: AT&T, T-MobileIn the Box:1 x 2CH 4G GSM Relay Switch1 x USB to micro-USB cable1 x Internal antenna1 x External high gain antenna1 x 12V 1ADC power adapter1 x U-disk manual and software

## Features

- USA MULTI-BANDS 4G MODULE enable relay switch device can work with AT&T, T-Mobile 4G and 3G network, NOT work in other countries
- 2 CHANNEL RELAY SWICHES with 30A HIGH RELAY CONTACT enable you to control feral hog trap system, auto gate, aircraft engine heater and lights etc. anytime anywhere in the world
- FREE CHARGE PHONE CALL No.1 relay can be remote controlled by phone call, no minutes are used as it doesn't actually answer the calls - it recognize caller ID and then reject your phone call to turn on/off the switch automatically
- SMS FEEDBACK CONFIRMATION relay device will send you sms feedback after phone call or sms remote control, so you will know that relay switch received your command and act correctly
- MULTI PROGRAMMING WAY Android APP software,SMS text programming way,Windows PC software via USB,WiFi LAN hotspot access on PC(WiFi module optional)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | KiaoTime |
| Part number | KT-G3 |
| Item Weight | 605 g |
| Product Dimensions | 17.78 x 12.07 x 5.72 cm; 605 g |
| Manufacturer reference | KT-G3 |
| Colour | Kt-g3-a(at&t,t-mobile) |
| Material | ABS |
| Item thickness | 2.25 Inches |
| Power source type | DC |
| Voltage | 12 Volts |
| Installation method | Wall-Mounted |
| Item Package Quantity | 1 |
| Plug profile | Wall Mount |
| Batteries included? | No |
| Batteries Required? | No |

## Product Details

- **Connector type:** Micro USB
- **Contact material:** Silver
- **Contact type:** Normally Open
- **Current rating:** 30 Amps
- **Mounting type:** Wall Mount

## Images

![KT-G3-A USA 4G GSM AUTO Relay Switch 12V Remote Control Box Wireless Gate Opener 2CH Output HOG Trap System 30A Relay Contact(for AT&T and T-Mobile) - Image 1](https://m.media-amazon.com/images/I/61gsz9+9XwL.jpg)
![KT-G3-A USA 4G GSM AUTO Relay Switch 12V Remote Control Box Wireless Gate Opener 2CH Output HOG Trap System 30A Relay Contact(for AT&T and T-Mobile) - Image 2](https://m.media-amazon.com/images/I/61Qqkp3tGLL.jpg)
![KT-G3-A USA 4G GSM AUTO Relay Switch 12V Remote Control Box Wireless Gate Opener 2CH Output HOG Trap System 30A Relay Contact(for AT&T and T-Mobile) - Image 3](https://m.media-amazon.com/images/I/71UcQMCo7bL.jpg)
![KT-G3-A USA 4G GSM AUTO Relay Switch 12V Remote Control Box Wireless Gate Opener 2CH Output HOG Trap System 30A Relay Contact(for AT&T and T-Mobile) - Image 4](https://m.media-amazon.com/images/I/6192vRTVvPL.jpg)
![KT-G3-A USA 4G GSM AUTO Relay Switch 12V Remote Control Box Wireless Gate Opener 2CH Output HOG Trap System 30A Relay Contact(for AT&T and T-Mobile) - Image 5](https://m.media-amazon.com/images/I/71VpVWm7mbL.jpg)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-14*