• USB rechargeable device using a vapor-like cloud to determine air movement
• Light weight & easy to use
• 1000+ Puffs per cartridge, twin pack of replacement cartridges available
• Features 3 multi-colour LED bulbs. White & Red for low light conditions. (White LED can be used as a torch)
• Built-in Power Bank Charger used to charge mobile phones and portable devices

Who better to need or understand wind currents and thermals than the HVAC techs and installation companies? HVAC professionals have discovered Cirrus® Wind Indicators and they are replacing the traditional smoke pens and large bulky smoke machines used for decades.