The Yellow Jacket 67071 YJACK Temperature/Humidity Kit provides a total HVAC/R diagnostic solution. The YJACK Temperature/Humidity Kit includes two YJACK Temperature Clamps, two YJACK DEW Psychrometers, and one YJACK PATH. The YJACK Temperature Clamp provides wireless Bluetooth measurements for surface temperature of pipes up to 1.25" diameter and has a flexible cable connection for easy access in small and difficult-to-reach areas. Using a Bluetooth signal, the YJACK DEW Psychrometer wirelessly measures temperature, humidity, wet bulb, dew point and more in ambient air or ventilation ducting. The YJACK PATH Range Extender connects and re-broadcasts up to six YJACK devices and up to two P51-870 TITAN devices at one time using a Bluetooth signal, while providing amplified signal strength through difficult-to-penetrate barriers.