OSI Alarm System Gen 2 (4G), 11pc, DIY, Motion & Entry Sensors, Wireless Siren, Remotes, App & Alexa Compatible Self Monitor(No…
Best for
Best DIY self-monitoring
Amazon rating
Amazon aggregate, one input among many in the Verdict Score
Current price
$159.99
Updated Jun 27, 2026 · 1 min read
The consensus
What reviewers found
Synthesized across the trust-weighted source mix below.
Across the verified-purchase reviews we read, the OSI Alarm System Gen 2 holds a 4.4-star average over roughly 182 ratings. Its differentiator is the combination of 4G connectivity and a self-monitoring model with no required monthly fee, plus an optional 24/7 monitoring plan, which appeals to buyers who want cellular backup and to avoid subscriptions where possible. The evidence base here is modest.
What reviewers liked
- No required monthly fee with optional 24/7 monitoring
- 4G connectivity for cellular backup
- Alexa-compatible DIY setup
- Generally positive 4.4-star buyer sentiment
Where it falls short
- Modest review base (~182 ratings) limits confidence
- Lower average rating than the major-brand kits
- No independent expert testing in the supplied signals
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Across the verified-purchase reviews we read, the OSI Alarm System Gen 2 holds a 4.4-star average over roughly 182 ratings. Its differentiator is the combination of 4G connectivity and a self-monitoring model with no required monthly fee, plus an optional 24/7 monitoring plan, which appeals to buyers who want cellular backup and to avoid subscriptions where possible.
The evidence base here is modest. With under 200 reviews and no independent lab tests, expert reviews, or specialist-community threads in the supplied signals, this pick rests on a relatively small pool of buyer sentiment. The rating is respectable rather than standout, and we have scored it as a credible niche option rather than a broadly-proven mainstream pick.
For cost-conscious shoppers who prioritize no-monthly-fee self-monitoring with 4G and Alexa compatibility, buyer sentiment is generally favorable, with the caveat that the corroboration is lighter than for the major-brand kits.
- ✅Flexible Monitoring with 4G Connectivity – Choose Self-Monitoring with No Monthly Fees, or opt in to 24/7 Alarm Monitoring (Canada only). Plans start at just $15/month with a 1-year subscription. No contracts — opt-in or cancel anytime* for total flexibility
- 📶 This panel can use a SIM card (not included) to receive SMS alerts directly. To enable this feature, a SIM card with an active talk/text plan from a mobile provider is required. This is an optional feature and will involve monthly fees charged by your cell provider.
- ✅Interactive Set-up Wizard - The wizard guides you step-by-step through the entire setup so your alarm system is configured correctly.
- ✅Continuous Updates - Maintain peak performance with regular, complimentary updates.
- ✅Next level Interface Design - HD 1024 x 600px anti-finger print touchscreen offers a responsive enhanced UI user experience.
- ✅Multiple User Access Levels - Features (1) administrator accounts with full access and (5) user accounts with limited access. Perfect for Airbnb , renters, guests or children who you want to lock out of system settings.
- ✅Scalability - Your security, your way
- Scale up easily with room for up to 160 sensors, 6 controllers, 6 doorbells and 6 keypads! Perfect for Houses, apartments and Small Businesses
- ✅24 Hour Back-up Battery - Experience uninterupted security with our Wi-Fi alarm system's 24 hour back-up battery.
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