https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions
Product Info
125500 MarkTag Classic

125500 MarkTag Classic

TagMaster AB
Region: Sweden
Update: 11/28/2011
Key Specifications

The MarkTag Classic is the standard choice of ID-tag in parking and access control applications that require hands-free vehicle access.

Features:
*Operating frequency: 2.435 GHz to 2.465 GHz
*Reading range (Example): Up to 6 metres using LR-6 reader
*Read cycle:Random mode
*Dimensions:86x54x3 mm (3.39x2.13x0.12 in)
*Encapsulation:Polymer
*Colour:Grey Scale
*Battery lifetime:6 years under normal conditions
*Operating temperature: -20 °C (-4 °F) to +85 °C (+185 °F)

https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions