This Quantum Key Distribution (QKD) Receiving Module is designed for entanglement-based BBM92 protocol implementations in quantum communication systems. The module integrates four silicon single-photon detectors (SPDs) together with a dedicated optical design for polarization and correlation measurements. It is customizable for different input wavelengths and can be configured to operate as either Alice or Bob, depending on system requirements. Two versions are available: a terrestrial version for laboratory and ground-based QKD systems, and a space-qualified, CubeSat-compatible version optimized for compactness and operation in space environments. The module is suitable for space and ground quantum key distribution experiments and demonstrations.