YoLink Technology YoLink is a proprietary wireless technology provided by YoSmart. which is based on the Semtech s LoRa wireless technology combined with the YoSmart smart home/building protocol to provide the most advanced smart home/building devices solution. Compared to WIFI Bluetooth ZigBee Z-Wave and other smart home protocols it has the advantages of low-power consumption long-distance coverage (wall penetration) and anti-interference. It is the first smart building/home protocol that can be very easily setup and is a very low cost but creates a reliable robust and more secure IoT network. Requirements: Smartphone or tablet running iOS 9 or higher Android 4.4 or higher Specification: YoLink Hub Power: In-wall power adapter Input: 5V DC Maximum Current: 1A Working Temperature: -20°C~50°C (-4°F~104°F) Humidity: 0~90% non-condensing YoLink Temperature & Humidity Sensor Voltage: 3V DC (2 - AAA batteries) Alert Temperature: -22°F ~ +158°F ±0.54°F (-30°C ~ +70°C ±0.3°C) Low Temperature Alert Default: 64°F (18°C) High Temperature Alert Default: 95°F (35°C) Alert Humidity: 0% ~ 100% ±3% Low Humidity Alert Default: 0% High Humidity Alert Default: 100% Working Temperature: +14°F~+122°F(-10°C~+50°C ) Working Humidity: ≤95% (non-condensing) Package List: 1 x YoLink Hub 2 x YoLink Temperature & Humidity Sensor Please Note: YoLink Hub requires a 2.4 GHz Wi-Fi connection or a wired connection. YoLink products work only in the USA and Canada.