Bluetooth air velocity probe with flip-up telescopic sensor wand. Use in conjunction with the TPI View app to record and email out air velocity and temperatures simultaneously. Records minimum, maximum and average readings. Operates with m/s, k/m/h, ft/min, knots and mile/h units of measurement. Ideal for air duct analysis of commercial and residential HVAC systems. Works with iPhone, iPad, Android & Bluetooth 4.0 381mm Brass Probe Real-Time Read-Out Displays Readings via App Auto Power Off in 10 Minutes Temperature Range: -20-60°C Air Velocity Range: 0.2-20m/sec Wand Can Extend To 38cm Works with iPhone, iPad, Android & Bluetooth 4.0 381mm Brass Probe Real-Time Read-Out Displays Readings via App Auto Power Off in 10 Minutes Temperature Range: -20-60°C Air Velocity Range: 0.2-20m/sec Wand Can Extend To 38cm