UHF RFID tag is widely used in various industries. It has the advantages of large memory capacity of data, reusable, multiple tags can be read at one time, long identification distance, fast data transmission speed, high security , long service life, and resistance to harsh environments. It can be used for asset management, production line management, supply chain management, warehousing, anti-counterfeit traceability of various items (such as tobacco, alcohol, medicine, etc.), retail, vehicle management and so on.   Different countries and regions have different standards for the frequency band of  UHF RFID tags. For example: China：840~844MHz and 920~924MHz US, Canada, Puerto Rico, Mexico, South America：902MHz ~ 928MHz EU：865MHz~868MHz Hong Kong, Thailand, Singapore：920MHz~925MHz Japan：952MHz~954MHz. 1.How important is the impact of the application environment on the tag? Metals and liquids have a large impact on the performance of UHF RFID products. Therefore, the application environment is metal or non-metal, liquid or plastic, glass, wood, etc., is the primary consideration. Raw materials have a direct impact on the radio frequency signal of RFID tags. For example, when the tag is used in metal objects or in the working environment with many metal influence, it is necessary to use RFID anti-metal tags, so as to reduce the interference of metal on the tag data signal and facilitate the normal use of RFID tags. The performance of UHF RFID tags is easily affected by the environment. To determine whether the product is suitable for the actual application environment, in the preliminary testing stage, the tag must be used directly on the object, so that obtain a valuable test results. 2.What are the factors that affect the identification distance of tags？ The reading distance of a label is also directly related to the reader and antenna.  Therefore, it is necessary to clarify the installation position and Angle of the reader and antenna. At the same time, power selection, antenna gain, polarization mode, radiation Angle and other parameters need to be considered. In the whole RFID system, every detail may affect the actual reading distance, whether it can finally meet the project requirements, and even the length of the feeder (the cable connecting the antenna and the reader) needs to be considered. 3.The understanding of the size of the label In our many past project experiences, customers often want the size of the RFID label to be small, they think it is both good-looking and easy to install. However, the size of the label is precisely one of the main factors that determine the performance of the label. Generally speaking, the larger the size, the better the label performance can be designed. Different manufacturers, different model specifications, different production processes of integrated ICs and different manufacturing technologies of antennas will have different prices. So consumers should choose label according to their actual usage and cost budget. 4.Other considerations In addition, there are other detailed considerations, such as: whether the label has temperature and humidity resistance and other environmental reliability requirements? How much data capacity is required to be written to the tag? What is the maximum number of tags that need to be read at one time? And so on... With 13 years of RFID development and manufacturing experience, XGSun can design and produce the most suitable product for your needs. Please contact with us Asap.