IR illuminator delete caps for you hunters who can’t have them while hunting. You remove the IR illuminator and a screw on this waterproof cap in its place to protect the contacts from the elements.
The PLUG-M21 is compatible with the ZULUS LRF and TNC225R models. it will NOT fit the non-rangefinding Zulus
The PLUG-M24 is compatible with the ZHD520R-V2, ZHD312R-V2, TNC335R and TNC635R models