The 433 MHz M131 Thin Tag is a battery-powered RF transmitter that attaches to items that need to be tracked, located and identified. Every tag broadcasts its unique ID and a status message at a periodic rate (that is programmed at the factory). With their low profile and rounded edges, M131 Thin Tags are specifically designed for tracking IT equipment and shareable resources such as handheld and laptop computers that slide into carrying cases and frequently move between different locations.

The M131 tag’s adhesive backing allows for easy installation and helps prevent tampering or removal of the tag. M131 Thin Tags are designed to be used for the entire lifespan of a single asset. Simply peel the adhesive backing off of the tag, apply the tag to an asset, and you’re done. RF Code’s patented communication protocols allow for very high tag densities. Large populations of tags can be deployed in highly scalable asset tracking environments.

M131 tags are programmed to operate at 2.5-second beacon rates, and can be customized to support an integrated tamper detection sensor. Once applied, if the M131 is removed from the asset it will broadcast a tamper detected signal, enabling you to react accordingly.

Tag cases are impact resistant, splash resistant and temperature stable. Read ranges up to 150 feetare typical. The standard tag operates with a very low duty cycle that translates to long battery life (typically > 3 years at a 2.5-second beacon rate). Based on the ratings and specifications from the battery manufacturers, RF Code develops usage models to calculate the life of the active RFID Tags. Like all models, there are assumptions and approximations involved. The values are to be taken as engineering estimates – not guaranteed performance. Exposure to extreme temperatures will shorten the battery life. RF Code warrants all tags to be free from defects in materials and workmanship for a period of 1 year.


  • Encoded Radio Transmissions at 433 MHz
  • Low Profile and Rounded Edges
  • Thin Tag Enclosure
  • Designed for Use with a Single Asset
  • 2.5 Second Beacon Rate
  • Low Power Consumption for Long Battery Life
  • Smart Tag Options: Tamper Detection
  • Superior Anti-Collision Technology for High Tag Densities