Comfort that runs itself — and trims your energy bill.
Alarm.com ADC-T40K-HD — Smart Thermostat HD with Color Touchscreen Display, Z-Wave SmartStart and S2 Compatible. Compatible with Altium 360 self-monitoring or 24/7 professional monitoring.
In stock — ships in 1–2 business days- Works with self and professional monitoring
- Controlled from one unified app
- Backed by expert technical support
- Works with the Alarm.com app on iOS and Android
- Compatible with Altium 360 self and 24/7 professional monitoring
- Self-monitoring included
- Pro monitoring available
- Upgrade anytime
- Mobile app included
- Cellular backup
- Emergency dispatch (where available)
Pricing varies by package and monitoring plan. See Home packages or Business packages.
Built on Alarm.com — the platform behind millions of professionally monitored homes.
This device is part of the same ecosystem trusted by leading security dealers across North America. It's designed to be reliable when it matters — and to keep working when consumer-grade smart home gear gives up.
- Engineered for professional monitoring — not a hobbyist cloud you'll outgrow.
- 99.9% platform uptime with dual-path cellular + Wi-Fi failover, so signals get through even if the internet is cut.
- Encrypted video with on-device edge AI — people, vehicles, and animals are recognized locally before anything is uploaded.
- Dealer-only hardware tier — not sold on Amazon, not repackaged from consumer parts.
- Crash & Smash protection: the panel signals monitoring the moment it's tampered with, not after the countdown.
- Geofencing, smart schedules, and one-tap arming built in — no third-party subscriptions.
About the Alarm.com ADC-T40K-HD Smart
The Alarm.com ADC-T40K-HD Smart Thermostat HD represents the next generation of intelligent climate control. Designed with a sleek, modern aesthetic and a vibrant color touchscreen interface, this thermostat provides users with a premium experience for managing their home or business environment. Its high-definition display allows for easy reading and navigation of settings, ensuring comfort is always just a touch away.
Built specifically for the Alarm.com platform, the ADC-T40K-HD offers unparalleled integration with other smart home devices. By leveraging the power of Energy Star certification, this device helps users reduce energy waste and lower utility bills through automated schedules and location-based triggers. Whether you are at home or away, the thermostat adapts to your lifestyle to provide optimal efficiency without sacrificing comfort.
Installation is streamlined for professional security and smart home providers, ensuring a reliable connection to the property's Z-Wave network. With remote management capabilities, users can adjust temperature settings, view reports, and receive maintenance alerts directly through the Alarm.com mobile app. This thermostat is a centerpiece for any modern smart home system, combining advanced functionality with a sophisticated design.
Why this device
- Works with self and professional monitoring
- Controlled from one unified app
- Backed by expert technical support
- Works with the Alarm.com app on iOS and Android
- Compatible with Altium 360 self and 24/7 professional monitoring
- Pairs with our DIY security device kits in minutes — no contract required
- Backed by Altium 360 expert support and warranty
Why customers choose Altium 360
- Alarm.com Authorized Dealer
- Secure online checkout
- Flexible monitoring options
- Expandable security platform
- Manufacturer warranty
- Professional technical support
- Easy DIY installation
- Residential & commercial solutions