Product description
Whole-Home Smart Security System, Protecting Your Family’s Safety
Smart home security systems safeguard every corner of your home, eliminating blind spots.

Mobile Sensor
Infrared detector, detects all moving objects, zero false alarms

Door and Window Sensor
Door and window sensors can be installed on room doors and balcony windows to provide multiple security options.

Wireless Remote Control 
Mobile app notification 
Use a whole-home smart system to safeguard your family’s safety and well-being. 
Easy Installation No professionals required. No wiring or drilling needed. Simply mount the main unit on the wall (screws included) and connect to power. Supports expansion to 100 learning/storage/location units. Flexibly configure remote controls, RFID cards, and wireless detectors.
Mobile Remote Control View and control your security system anytime via smartphone (requires SIM card or WiFi). Arm/disarm, voice monitoring, and intercom functions available.
Intrusion Protection When triggered, accessories instantly send wireless signals to activate the alarm system. It emits a high-decibel alert to deter intruders while simultaneously calling or texting preset contacts.
Built-in Battery The system remains fully operational even if wires are cut or power is interrupted. It continues to effectively deter intrusions during power outages.
Dual-Mode Network Support Compatible with 2G/3G/4G SIM cards (purchased separately) and 2.4GHz Wi-Fi networks (does not support 5G). Automatically switches to GSM communication when Wi-Fi power is lost.
9 reviews for YBJ12-Piece Alarm System — Wireless Smart Home Security System | Supports 99+ Wireless Zones | Easy Installation | Mobile App Control | Compatible with Surveillance Systems | Alexa Compatible
Add a review
$39.99
Yaneisi –
Very good
Extremely useful and very good quality.
FAUSTINO PAGLIOCCA –
Calidad
Excelente
Martin –
Easy DIY alarm
It’s been almost a month now and it work really good. Easy to install (the manual is not all that good, but there are plenty of videos around to figure out how to install and configure all). And you can check all from the app too.
Edward Orlando Martinez Bahamon –
Alarma recomendada.
Producto igual al ofertado. Fácil instalar. Fácil parametrizacion.
laughing –
good
It’s very loud, supports multiple languages, and comes with 6 alarms and 3 infrared sensors, offering a variety of functions.
Bka –
Doesn’t work
It has a nice appearance but doesn’t work, the alarm turns on on its own even when not armed…Don’t loose your money like I did!
Amazon Shopper –
Worked perfectly with my existing system
I picked these up as extra sensors for my existing YBJ alarm system, and they worked exactly how I needed them to. Pairing them with the panel was pretty straightforward, and once they were connected, they responded right away when doors or windows were opened.Installation was super simple too, just peel and stick. They’re lightweight and don’t stand out much, so they blend in fine on doors and window frames. The connection has been solid so far with no random dropouts or missed alerts.One thing to keep in mind is that these won’t work on their own, you do need a compatible alarm system for them to connect to. As long as you already have that, they’re a really easy way to expand your setup without much hassle.If you’re already using a YBJ system and need more sensors, these are a solid choice.
Craig strasburg –
Tough programming
Nice packaging fast shipping looks great but the instructions are not only a little vague but very hard to follow on seeing your phone up as every phone is a Lil different, getting it programmed not to go off in home mode took 2 days. Not for beginners, you need to be competent on following directions to the letter and even then it is not always what they say it is on outcome, alarm went off a lot trying to figure it out and it is loud.Would recommend for beginner systems
Arman Ahsan –
Total wast of money really disappointed.