The long-awaited ALD Module now gives your Apex the ability to detect water on the floor in up to four separate locations and tells your Apex to sound an alarm, email you, or whatever action you desire giving you the ultimate in peace of mind. This new module is Plug-and-Play, connecting to the Apex System’s AquaBus. It has four separate probe ports where you can plug in either the optionally available low-profile probe (perfect for under carpets) or the weighted, solid-surface probe. The ALD has four inputs for the ALD probes. Features of the Advanced Leak Detection Module : Easily connects to ANY Apex via the AquaBus interface Four independent leak detection channels Multiple ALD can be used on one Apex Solid-Surface and Low-Profile ALD Probes available (sold separately) – 8? cable length Compatible with all Apex Systems ALD probes not included