Egis MRBF Dual Output Terminal Block - 30-300 Amp [3602] Brand_BoatLIFE Simply put

Simply put

Alert- Icon LEDs provide warning and alert status for quick diagnostics

So the only piece left for saltwater to attack is this little zinc anode

Protection key: Output short circuit

and they continue to do so with the Chirp-ready B175 Medium Ultra-Wide (MW) Tilted Element™ Thru-hull transducer

Egis MRBF Dual Output Terminal Block - 30-300 Amp [3602] Brand_BoatLIFE Simply putMRBF Dual Output Terminal Block 30 300 Amp Features: Protects Electrical Circuits from short circuit events and over current loads, preventing wire insulation overheating and subsequent destruction. Ignition Protected When Used With Egis Mobile Electric MRBF Fuses safe for installation in closed compartments with potential explosive gases. Harsh Environment design with shock and vibration resistance ideal for marine and vehicle electrical systems.