NEW OPEN BOX INKBIRD CO2 Detector Bluetooth Indoor Air Quality Monitor IAM-T1 features a Sweden premium NDIR Sensor Senseair for high accuracy (30ppm+3% of reading). It includes a low-power electronic ink display ensuring ultra-long battery life and supports full viewing angles for easy monitoring of CO2, temperature, and humidity. The 5.0 Bluetooth connectivity allows real-time data viewing through the INKBIRD APP, ensuring your data stays private without cloud uploads. Enjoy up to 4 years of battery life with AA batteries, making it an ideal choice for continuous monitoring.