WS-Semi-Active-C operating frequency is 902~928MHz. It includes Temperature Sensor, LED Indicator and Buzzer sound alarm. Maximum battery life can be used for 7 years. Maximum reading distance can be reached to 30 meters. Tag can be scanned by UHF RFID Reader, and Tag lights up and responds with audible prompts to find the object. When object be found, Tag will make prompts. Built-in Temperature Sensor for fire detection. The Temperature Sensor will issue alarm when it is 20~50 degrees Celsius. It can be applied on long distance vehicle positioning, with a range of up to 30 meters.