Symmetry ET20-7FM-LAM-CBA3-BAM2 Blue 939F-CBA3 Combination Wallswitch

The Symmetry ET20‑7FM‑LAM‑CBA3‑BAM2 “Blue 939F‑CBA3” combination wallswitch is a sleek, wall‑mounted security interface device that merges credential reading and switch control in a single‑gang form. It provides Bluetooth connectivity, enabling wireless credential communication or remote configuration. The unit supports ISO 14443A smart cards, reading the card serial number (UID) from typical 4‑byte UIDs, thus integrating smoothly with NFC access solutions. In addition it supports legacy GE/UTC formats (10, 12, or 15 digit) to maintain backward compatibility with existing systems. Because it combines both switch and reader functionality, installation is efficient: the device can replace a standard wall switch while delivering security control. Its compact design allows mounting in standard wall switch boxes, and its electronics are tuned for durability, consistent reading performance, and ease of integration within access control ecosystems. According to the vendor listing it operates at 12 VDC.