The16-Zone/16-Output Expansion Enclosure includes a 16-input/16-output expansion board with enclosure and a lockset with two keys. Only works with the Omni Pro II, up to 8 can be used plus two regular zone expanders. Total of up to 176 zones. Expand your OmniPro II automation controller with up to eight of these expansion enclosures! This expansion enclosure provides 16 additional inputs for additional security/fire zones, temperature inputs, etc., and 16 extra outputs to control sprinkler systems, pumps, motors, circuit breakers and more. Expansion enclosures can be mounted up to 1,000 feet from the main controller. Each expansion enclosure has its own power supply and battery. Expansion enclosures are available in two different configurations, with optional relay expansion modules. Specifications HAI Product No.: 17A00-1 Compatibility: OmniPro II Inputs: 16 Outputs: 16 Capacity: Up to 176 zones Click here for more Product Info > Hide Details Section > Please note: The HAI Omni series of products is professional grade and should only be installed by a licensed professional. All tech support inquiries and product return requests must be made by a licensed professional directly to the manufacturer at 1-800-229-7256.