Specification: Model: GT8907 Wind speed measurement range: Unit: m/s; Ft/min; Knots; Km/h; Mph Wind speed range: 0.0~45.0; 0.0~8800; 0.0~88.0; 0.0~140.0; 0.0~100 Resolution: 0.01; 0.01/0.1/1; 0.01; 0.01; 0.01 Minimum threshold value: 0.3; 60; 0.6; 1; 0.7 Precision: ¡À3%¡À0.1; ¡À3%¡À20; ¡À3%¡À0.2; ¡À3%¡À0.4; ¡À3%¡À0.2 Air volume measurement range: CFM: 0~999900 ft3/min CMM: 0~999900m3/ min Unit: CFM(FT3/MIN) ; CMM(M3/MIN) Range: 0~999900; 0~999900 Resolution: 0.001~100; 0.001~100 Area: 0.001~9999ft2; 0.001~9999m2 (1) temperature measurement range Unit: ¡æ/ ¨H; Range: 0~45/ 32~113; Resolution: 0.1/ 0.18; Accuracy: ¡À1.0¡æ/¡À1.8¨H (2) Humidity measurement range Unit: %RH; MIN/: 10-90; Resolution: 0.1; Precision: ¡À5%; Test condition: 90%RH without condensation Working current: Unit: mA/ mA/ V/ uA Description: Working current 1:/Working current 2:/ Low battery indication/Power off current TYP: 18/ 23/ 4/ 5 Test condition: backlight is off/ backlight is on Working environment:Temperature 0~5¡æ (32~122¨H); Humidity 40~80%RH Storage condition:Temperature -40~60¡æ(-40~140¨H); Humidity ¡Ü80%RH Power supply: 4x 1.5V AAA batteries (NOT included) Weight: 1214 g / 42.8 oz(approx.) Package list: 1 * Anemometer