The S1+ is a compact and versatile air quality monitor designed to keep you informed about the indoor environment. It accurately measures PM2.5 levels along with temperature and humidity, and features a clear 3-color quality indicator—green, orange, and red—to visually signify air quality conditions from good to poor. Equipped with a built-in buzzer alarm, the S1+ promptly alerts you when PM2.5 levels rise to unhealthy levels, allowing for immediate corrective measures. The device supports two operational modes, Eco and A, with battery life extending up to 60 days on Eco mode, making it a reliable choice for continuous monitoring. Additionally, BLE connectivity enhances its functionality, enabling easy data tracking and adjustments through a companion app.