YBJ Wireless Home Alarm System - DIY WiFi Alarm System for Home

In this review of the YBJ Wireless Home Alarm System the bottom line is straightforward: this 16-piece DIY kit is best for renters and homeowners who want a full-featured alarm without ongoing subscription costs. The reviewer found it easy to set up, with clear app control via Tuya or Smart Life and convenient voice control through Alexa and Google Assistant. The standout reason to buy is the combination of no monthly fee and dual-network backup, meaning alerts continue if WiFi fails and the system remains manageable from a phone.

Key Features

• No Any Monthly Fee: The system works with the free Tuya or Smart Life app so users avoid recurring subscription charges while retaining remote control and push alerts to their smartphone.
• Comprehensive 16-piece Kit: The package includes an alarm host, 3 PIR motion detectors, 6 door/window sensors, 2 remote controls, 2 RFID cards, 1 siren and 1 SOS button so most small-to-medium homes are covered out of the box.
• Easy to Install: Setup requires no professional, wiring or drilling beyond mounting the alarm host with supplied screws and connecting to power, making it renter-friendly.
• WIFI and GSM Dual Network: The host supports 2.4GHz WiFi and a 2G/3G/4G SIM (SIM not included) for alarm calls or messages when WiFi is unavailable.
• Timing Arm and Disarm: The app and keyboard allow scheduled arming/disarming and entry delay times to reduce false alarms when leaving or returning.

Who It's For

The YBJ system suits renters, small-home owners and anyone who prefers a no-subscription alarm and wants simple DIY installation with app control. It is particularly useful where occasional WiFi outages occur, since a SIM card can provide backup alerts.

Customers who need professional monitoring, advanced wired sensors, or 5GHz WiFi compatibility should look elsewhere; the system does not support 5G WiFi and the GSM option requires purchasing and managing a separate SIM and service plan.

Pros & Cons

Pros

• Complete kit with motion, door sensors, remotes, RFID tags and siren provides broad coverage immediately.
• No monthly fee and use of free Tuya or Smart Life app keeps long-term costs low.
• Dual network support (WiFi plus optional GSM) offers redundancy for alerts during outages.
• Simple DIY installation with included screws and batteries in devices speeds deployment.

Cons

• Does not support 5GHz WiFi, only 2.4GHz; users with 5G-only routers must reconfigure or use a compatible network.
• The GSM backup requires purchasing a SIM and cellular plan separately, adding some setup work and potential cost.

Specifications

Brand	YBJ
Kit Contents	1 alarm host, 3 PIR motion detectors, 6 door/window sensors, 2 remote controls, 2 RFID cards, 1 siren, 1 SOS button
App Compatibility	Tuya and Smart Life (free apps)
Network	2.4GHz WiFi and 2G/3G/4G GSM (SIM not included)
Voice Control	Works with Alexa and Google Assistant
Installation	DIY, screws included, no wiring required
Device Capacity	Supports up to 100 remote controls/RFID/detectors

Our Verdict

The YBJ Wireless Home Alarm System is a practical, cost-conscious choice for people who want a complete DIY security setup without subscription fees. Its included sensors, app control and GSM fallback deliver reliable basic protection, making it good value for renters and small homeowners who need straightforward, budget-friendly alarm coverage.

Frequently Asked Questions

Does this system require a monthly subscription?
No, the YBJ system works with the free Tuya or Smart Life app and has no required monthly fee.

Can it still alert me if my WiFi goes out?
Yes, the alarm host supports a 2G/3G/4G SIM card for GSM alerts when WiFi is unavailable (SIM not included).

Is professional installation needed?
No, the kit is designed for DIY installation with no wiring required and screws provided for the alarm host.