Water Witch 217 12v bilge pump switch No moving parts & no electrolysis. Impermeable to all bilge substances. Activates when water touches lower sensor. Will not interfere with other electronics & will not pump a bilge full of pure gas, diesel or oil. Easy to install & mounts at any angle. 30 lead of 16 ga. tinned copper wire. 7 year limited warranty. 2-5/8W x 1-5/8H x 1-5/8D. Uses . 006 amps. Submersible. WORKS WITH BOATSENSE REMOTE MONITORING SYSTEM.