HTC Instrument AVM-07 Digital Vane Anemometer Optional RS-232 CO millimeter Unication

it is an okay product. I bought it for my project. the packing was so bad as i got the product with a damaged box( it comes with a black box probably plastic ) . please note these things before you buy this1) it need 4 AAA battery.2) has a display with blue light , so you can use it in dark conditions also.3) there is no port available for RS232 commumication.4) it has a limited no of service centers5) i am not sure,weather this "HTC" is same as that of the one making mobile phones and other gadgets.THE MOSTIMPORTANT thing is that the seller is not providing any invoice.

Very good product and accurate result given by this instruments

good quality

Poor used product....