supply of digital type anemometer , digital type anemometer with remote vane, cord & battery installed, different ranges ofair velocity:0.40-25m/sec (125 ft-4900 ft/min.), air flo w:0.01 m-99.99 cubic meters per sec (1 ft-9999cubic feet per min), air temperature: 0 degree c-50 degree c as per the specifications 1) display: dual 4-digi t(9999 count) lcd. 2) operating temperature: 32 degree f to 122 degree f(0 degree c to 50 degree c). 3) operating humidity: max. 80% rh. 4) power suppl y: 9 v battery(heavyduty alkaline). 5) battery life: 100 hours or more. 6) sensors: air velocity/flow sensor: conventionalangled vane arms with low friction ball bearing. 7) temperature sensor: precision thermistor. as per make metravi-avm-05 or equivalent. [ warranty period: 30 months after the date of delivery ] ]