Testo 405I Smart Probe Air Conditioning Test A/C Refrigerant Thermo Anemometer. Full working order and comes in original retail packaging, with instructions, lanyard and batteries included. The Testo Smart Probe is a compact measuring instrument that can be operated wirelessly from a smartphone or tablet. Thermal anemometer with Bluetooth capability. Measures air flow velocity, volumetric flow and temperature. Easy configuration of dimensions and geometry of duct to determine volume flow. Telescopic shaft extendable up to 400mm. Measuring range (temperature): -20°C to +60°C. Air Velocity Range: 0m/s to 20m/s. Operating Temperature Min: -20°C. Operating Temperature Max: 50°C. Product Range: Testo Smart Probe. Country of Origin: China. Please see pictures for item condition, I can’t stress this enough, look at the pictures!