*Features:*Simultaneous display of air velocity plus ambient temperatures*Combination of hot wire and standard thermister, deliver rapid and precise measurements event at low velocity*Wide range measurement of air velocity*Multi-functions for measurement: m/s, km/h, ft/min, knots, mile/h, CMM (732/733), CFM (732/733)*Infrared thermometer measures remote surface temperature to 537.5C(999.5F) with 8:1 (730/732)/30:1 (733) distance to spot ratio*Data hold and record / recall maximum, minimum and average reading*Auto power off after 10 minutes of idle (30 minutes with AC power)*Measurement:Air Velocity:m/s, ft/mim, km/h, mile/h, knotsAir Flow: CMM, CFMTemperature:C and F*Air Velocity Range:0.00~40.00 m/s, 0.1~7874.0 ft/min, 0.00~144.00 km/h, 0.00~89.50 mile/h, 0.00~77.75 knots*Air Velocity Resolution:0.01 m/s, 0.1 ft/min, 0.01 km/h, 0.01 mile/h, 0.01 knots*Air Velocity Accuracy:(0.03 ms+3% of reading); (5.9 ft/min+3% of reading); (0.11 km/h+3% of reading); (0.07 mile/h+3% of reading); (0.06 knots+3% of reading)*IRT Temp. Range:-32~537.5C (-25.6~999.5F)*IRT Accuracy:-32~-20C (-25.6~-4F): 3C (5.4F), -20~100C (-4~212F): 2C (3.6F), 100~537.5C (212~999.5F): 2%*D/S Ratio:8:1*Emissivity:0.95 fixed*Sample Time:Approx. 0.5 sec.*Operation Temperature:0~50C (32~122F); 10~90% RH*Weight:320 g (11.29 oz.)*Dimension Main: 184 x 70 x 40 mm (7.24 x 2.76 x 1.57 inch) Telescope probe: approx. 1800 mm (70.87 inch) include wire rod*Accessories: Instruction manual, Carrying case, AC adapter, USB cable, CD (732/733)