... :read and write the tag 2.Identified distance:Maximum 80m(distance adjustable) 3,frequency:2.4GHz ACM301 is a type of ... charge, freeway ETC, safety-inspection from port or custom. 2 Personnel management: quick attendance administration, conference signature system, student ... , and container transfer control tracking management. Professional RFID 2.4GHz locator reader and writer for locating system