exhibit 10. 12 commercial lease this lease ( “ lease ” ) dated this day of march 2007 is made by and between waldo development, inc. ( the “ landlord ” ), whose mailing address is 585 sw biltmore street, port st. lucie, florida 34983 and xstream systems, inc. ( the “ tenant ” ), whose mailing address is 10305 102nd terrace, sebastian, florida 32958. witnesseth : landlord hereby leases to tenant and tenant hereby leases from landlord, the premises described below for the term and subject to the terms, covenants and conditions hereinafter set forth : 1. definitions. unless the context otherwise specifies or requires, the following terms shall have the meanings herein specified : 1. 1 base rent : the base rent for the space is on a gradual increase basis for the accompanying time periods as set forth in exhibit “ a ” attached hereto and made a part hereof ( plus all applicable sales tax ). 1. 2 building : collectively, the building and other improvements on the land. 1. 3 commencement date : march 15, 2007. a. common areas : all facilities furnished by landlord and designed for the general use, in common, of occupants of the building, including tenant, their respective officers, agents ’ employees and customers, including but not limited to any of the following which may be furnished by landlord such as parking areas, driveways, entrances and exits thereto and landscape areas. all such areas shall be subject to the exclusive control, administration and management of landlord and landlord shall have the right from time to time to change the area, level, location, amount and arrangement of such parking areas, if any, and other facilities referred to above, to reasonably restrict parking by tenants and their employees and to make all rules and regulations pertaining thereto for the proper operation and maintenance of the common areas, so long as adequate parking is available to tenant and its officers, agents, employees, customers, at all times during the lease term. 1. 4 deposit : landlord requires a security deposit equivalent to the amount of three months of rent for an amount of $ 17, 335. 50. 1. 5 governmental authority : any federal, state, county, municipal or other governmental department, entity, authority, commission, board, bureau, court, agency or any instrumentality of any of same. 1. 6 governmental requirement : any law, enactment, statute, code, ordinance