Brand: Qingping (Xiaomi Eco System Brand) Product model: CGDN1 Product weight: 143g Product size: 63.6x46x 54.6 mm Screen size: 59.9x 49.9mm Bluetooth: BLE 5.0 Temperature range: 0°C~ 50°C Humidity range: 0 ~ 99% RH (non-condensing environment) CO2 range: 400 ~ 9999 ppm PM2.5/PM10 range: 0 ~ 500 μg/m3 Battery capacity: 2000 mAh