HOLDPEAK 866B-APP Anemometer Handheld APP with Wireless Bluetooth Vane Anemometer Meter for Measuring Wind Speed, Temperature, Wind Chill with Backlight (Black) FEATURES & SPECIFICATIONS: HOLDPEAK 866B-APP with wireless bluetooth connect to Phone Anemometer/Wind speed gauges ✔ Back Light ✔Wind Chill Indication ✔Low Battery Indication ✔Manual/Auto Power Off ✔Mobile APP ✔MAX/MIN/Average/Current ✔℃/℉ Selection ✔Wind Speed Range: 0.3-30m/s (MAX up to 69mph) ✔Wind Speed Unit Selection: m/s, Ft/min, Knots, Km/hr, Mph ✔Wind Speed Range:0.3~30m/s ✔Air Temperature Range:14℉~113℉.