Lightweight bluetooth meter for measuring ambient air C02 readings. Ideal for locations like offices and commercial kitchens. Use in conjunction with the TPI View App for displaying, recording and emailing readings. Magnet on back of meter for easy hands-free working. Works with - iOS App - Android App Real-Time Read-Out Displays Readings via App Auto Power Off in 10 Minutes Measures CO2 from: 0 - 6,000ppm "Out Of Room" Ambient Carbon Dioxide Tests Monitor Ambient CO2 Over Time Hub Not Required Works with - iOS App - Android App Real-Time Read-Out Displays Readings via App Auto Power Off in 10 Minutes Measures CO2 from: 0 - 6,000ppm "Out Of Room" Ambient Carbon Dioxide Tests Monitor Ambient CO2 Over Time Hub Not Required