Control and automate lighting, appliances, low-voltage devices, garage openers, gates, HVAC, irrigation, pumps, contactors and more—up to 16A. Versatile dry contact smart relay powered by 12/24VDC or 120VAC. Switches 12VAC, 24-48VDC and 120VAC loads. Supports Wi-Fi, Matter, local control, Home Assistant, custom scripting and more.
Rating 5 out of 5 stars with 1 review
The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.

Control and automate lighting, appliances, low-voltage devices, garage openers, gates, HVAC, irrigation, pumps, contactors and more—up to 16A. Versatile dry contact smart relay powered by 12/24VDC or 120VAC. Switches 12VAC, 24-48VDC and 120VAC loads. Supports Wi-Fi, Matter, local control, Home Assistant, custom scripting and more.

Shelly H&T Gen3 is a Wi-Fi humidity and temperature sensor with a large e-paper display for clear, at-a-glance readings. It includes an NTP-synced digital clock and supports Google Assistant, Amazon Alexa, and Samsung SmartThings for voice control and automations. Power it with 4 AA batteries (not included) or via USB-C for continuous operation. When battery powered, it measures at set intervals and reports changes based on thresholds. When USB powered, it measures and updates more frequently and reports data more often. Bluetooth is included to help with setup, and a reset button is available for manual control. The device supports Wi-Fi 802.11 b/g/n and Bluetooth 4.2. It operates from 32°F to 105°F (0°C to 40°C) and is recommended for 30% to 70% RH environments.

Are you being spied on? Protect your privacy anywhere with the portable RF detector from Knight Security, designed to safeguard your home, hotel room, or vehicle from hidden cameras, listening bugs, and GPS trackers. Equipped with ultra-powerful sensors that meet police, military, and professional security standards, it’s easy to use thanks to a clear step-by-step manual and demo videos. Its long lasting 3.7V 1500mAH lithium polymer battery provides up to 45 hours of operation, while the durable aluminum alloy body ensures lasting reliability. Featuring four detection modes—RF signal detection, magnetic field detection, hidden camera discovery scan, and smart detection—it delivers comprehensive protection and peace of mind, all backed by Knight Security, an American company known for premium quality.

Protect your home with the XODO SA2 Smart Security Alarm System. This wireless siren connects via Wi-Fi and alerts you with a powerful 90dB alarm and bright strobe LED flash. Easily arm or disarm through the XODO app or included remote keychain, and receive instant smartphone notifications when triggered. Compatible with the XODO PS2 Smart Motion Sensor (2-Pack), the SA2 integrates seamlessly for enhanced whole-home protection. With quick plug-in installation, Alexa/Google Assistant compatibility, and support for hearing-impaired alerts, the SA2 is a reliable smart security upgrade for any home.