--- product_id: 97211252 title: "GSM Wireless Security Alarm System - Smart4u House Burglar Intruder Alarm with built-in siren, PIR Detector, Door Sensor, Doorbell, Remote Control-Free APP DIY Alarm Kit, Works with SIM Card & Alexa" brand: "smart4u" price: "39.79 DT" currency: TND in_stock: false reviews_count: 7 url: https://www.desertcart.tn/products/97211252-gsm-wireless-security-alarm-system-smart4u-house-burglar-intruder-alarm store_origin: TN region: Tunisia --- # GSM Wireless Security Alarm System - Smart4u House Burglar Intruder Alarm with built-in siren, PIR Detector, Door Sensor, Doorbell, Remote Control-Free APP DIY Alarm Kit, Works with SIM Card & Alexa **Brand:** smart4u **Price:** 39.79 DT **Availability:** ❌ Out of Stock ## Quick Answers - **What is this?** GSM Wireless Security Alarm System - Smart4u House Burglar Intruder Alarm with built-in siren, PIR Detector, Door Sensor, Doorbell, Remote Control-Free APP DIY Alarm Kit, Works with SIM Card & Alexa by smart4u - **How much does it cost?** 39.79 DT with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/97211252-gsm-wireless-security-alarm-system-smart4u-house-burglar-intruder-alarm) ## Best For - smart4u enthusiasts ## Why This Product - Trusted smart4u brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description System Introduction The S1 Alarm System is designed with Powerful ARM+DSP CPU and MTK Nucleus Phone OS, it is of good operability and very easy to use. It is a reliable GSM/WiFi alarm system of high quality and an easy App control system. The system work with door sensors, motion sensors, doorbell, glass break detectors, panic buttons and other accessories with wireless connections. When alarming, it will push the alarm info with zones , names of sensors , make alarm sounds, send SMS and dial out the contacts setting in the system to notify the users. It is widely used in House, Apartment, Office, Shop, Warehouse, Farm, Shed, Driveway, Boat and any other places that needs alarm alerts to protect your safety and property. Say Goodbye to Monthly Fee, Contract and Exhausted Setting up! No longer to pay hundreds of pounds and sign bored contracts No longer to take hours to install, our system is works right out of the box S1 alarm system is smarter, simpler, and more affordable than anything you've seen before. Sorry Mr. Thief, you are unemployed! When door is open or motion is detected, the door sensor and PIR detector will trigger alarm signal.Then main panel receives alarm signal and notify user in multiple ways: SMS text/Phonecall/email/APP push/110dB loud horn sound to deter intruder. Key Features ●WiFi&GSM network, APP remote control, two way intercom ●Compatible with Alexa, voice instruction, easy to use ●Pair maximum 100 sensors, 99 logs for arm and disarm, 20 alarm phone numbers, 20 remote controls ●8 scheduled timer to arm and disarm, 15s record voice message when alarms ●Backup Lithium battery, when power failure still work for another 8 hourPackage Content 1 x Main Panel 2 x Remote Control 1 x PIR Detector 1 x Window/Door Sensor 1 x Doorbell Review: Good and cost effective alarm system. - Great value alarm system which given me peace of mind. Now i am relax while i am going out. I have checked all other products but this product was new so i thought let me try and i given try was good. This alarm system was easy to set up and works really well. All sensors were already paired to the main panel. Just have to connect to WiFi, register, positioning sensors and the alarm system is ready and running. I had some questions about its Alexa features and GSM setting, and the reply from the support team was very timely and great! They gave me YouTube video tutorial to speed up GSM connect process. So impressed i am going to add additional door sensors and pir sensors to cover the rest of my house. I never heard about this product which is smart4u but once I have used I can say go for it. Review: A great friend to leave at home - I was amazed that this alarm actually works, considering the very low cost I originally purchased it as a visual deterrent. However it is so simple to set up and use , it give me a the piece of mind i need when i leave my home. Jolly good purchase. ## Features - BEST STARTER KIT FOR SMART HOME ALARM - This house alarm system is equipped with a built-in 110dB loud siren, rechargeable batteries and fully pre-programmed alarm sensors that you can control via smartphone and instantly deter intruders to protect your house, apartment, driveway, business, office, shop, flat, boat, outdoor shed, garage, perimeter, van and any other indoor&outdoor places from anytime anywhere. Seniors, kids and property are in safe whether you are home or away - WORKS WITH GSM & WIFI NETWORK - This alarm kit support both WiFi (2.4GHz) and GSM cellular network when a data SIM card(not included)is inserted. When sensors are triggered by suspicious movements, Users can get alert via APP push notification, email and/or phone call, SMS texts, 2 way intercom. Support to preset and call 20 phone numbers in case of security break-in - EXPAND 100 ACCESSORIES - This residential alarm system is expandable to pair up to 100 accessories, including door sensor, doorbell, window, 433mHz pet friendly motion detection, glass break, siren, water leakage, shock pressure sensors. You can tailor your own smart home and control whole security devices remotely in just ONE APP. An ideal and commercial diy alarm system we all deserve - WORKS WITH ALEXA - This smart alarm system is compatible with desertcart Echo, you can arm, disarm, turn on/off the system with voice control like “Alexa, ask skynet to disarm”. This burglar system itself is also simple and easy to install, just plug in, open the “Smart Alarm" app, and scan QR code to add sensors to the system, no tools or drilling required - NO MONTHLY FEE NO CONTRACT - Without paying for a monitoring contract, you can save hundreds of pounds every year. Plus, FREE REPLACEMENT POLICY and MONEY BACK GUARANTEE make no risk for you! If you have any questions about our alarm system set up, please search “Smart4u alarm system” on YouTube for a video tutorial or contact us via support@smart4alarm.com ! ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07MKCQFGN | | Battery Cell Composition | Lithium Polymer | | Battery cell composition | Lithium Polymer | | Brand | smart4u | | Connectivity technology | Wireless | | Customer Reviews | 4.6 out of 5 stars 8 Reviews | | Manufacturer | smart4u | | Manufacturer Warranty Description | 365 days warranty period. | | Network Connectivity Technology | Wireless | | Noise level | 110 Decibels | | Sound Level | 110 Decibels | | UPC | 727523347848 | ## Images ![GSM Wireless Security Alarm System - Smart4u House Burglar Intruder Alarm with built-in siren, PIR Detector, Door Sensor, Doorbell, Remote Control-Free APP DIY Alarm Kit, Works with SIM Card & Alexa - Image 1](https://m.media-amazon.com/images/I/51IY6mlZSML.jpg) ![GSM Wireless Security Alarm System - Smart4u House Burglar Intruder Alarm with built-in siren, PIR Detector, Door Sensor, Doorbell, Remote Control-Free APP DIY Alarm Kit, Works with SIM Card & Alexa - Image 2](https://m.media-amazon.com/images/I/71aEcsDGHCL.jpg) ![GSM Wireless Security Alarm System - Smart4u House Burglar Intruder Alarm with built-in siren, PIR Detector, Door Sensor, Doorbell, Remote Control-Free APP DIY Alarm Kit, Works with SIM Card & Alexa - Image 3](https://m.media-amazon.com/images/I/716MJxTZg0L.jpg) ![GSM Wireless Security Alarm System - Smart4u House Burglar Intruder Alarm with built-in siren, PIR Detector, Door Sensor, Doorbell, Remote Control-Free APP DIY Alarm Kit, Works with SIM Card & Alexa - Image 4](https://m.media-amazon.com/images/I/61wBC42S9GL.jpg) ![GSM Wireless Security Alarm System - Smart4u House Burglar Intruder Alarm with built-in siren, PIR Detector, Door Sensor, Doorbell, Remote Control-Free APP DIY Alarm Kit, Works with SIM Card & Alexa - Image 5](https://m.media-amazon.com/images/I/61fJ0LPOz0L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good and cost effective alarm system. *by A***R on 7 January 2019* Great value alarm system which given me peace of mind. Now i am relax while i am going out. I have checked all other products but this product was new so i thought let me try and i given try was good. This alarm system was easy to set up and works really well. All sensors were already paired to the main panel. Just have to connect to WiFi, register, positioning sensors and the alarm system is ready and running. I had some questions about its Alexa features and GSM setting, and the reply from the support team was very timely and great! They gave me YouTube video tutorial to speed up GSM connect process. So impressed i am going to add additional door sensors and pir sensors to cover the rest of my house. I never heard about this product which is smart4u but once I have used I can say go for it. ### ⭐⭐⭐⭐⭐ A great friend to leave at home *by J***E on 30 June 2022* I was amazed that this alarm actually works, considering the very low cost I originally purchased it as a visual deterrent. However it is so simple to set up and use , it give me a the piece of mind i need when i leave my home. Jolly good purchase. ### ⭐⭐⭐ Good product, poor support! *by F***D on 12 March 2019* I used this product for my Motorhome where it fulfilled my requirements. Uniill the PIR ‘s on/off switch failed and fell off. This was reported to the manufacturer who initially responded and offered a replacement and is now ignoring all emails. They have dragged out the problem so long that I can’t return the product to Amazon for credit. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/97211252-gsm-wireless-security-alarm-system-smart4u-house-burglar-intruder-alarm](https://www.desertcart.tn/products/97211252-gsm-wireless-security-alarm-system-smart4u-house-burglar-intruder-alarm) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-10-01*