CONVERTIBLE PROMISSORY NOTE

Exhibit 10.3

The shares of stock   represented by this Note have not been registered under the
Securities Act of 1933, as amended, and may not be sold or otherwise transferred
unless compliance with the registration   provisions of such Act has been made or
unless availability of an exemption from such registration   provisions have been
established,   or unless sold   pursuant to Rule 144 under the   Securities   Act of
1933.


                           CONVERTIBLE PROMISSORY NOTE

Principal:   $262,500.00                                      Date: January 1, 2008

For value   received,   the   undersigned   NexHorizon   Communications,   Inc. or its
successor    ("NexHorizon")    ("the    Promisor")   at   9737    Wadsworth    Parkway,
Westminster,   CO 80021 promises to pay to the order of Barbara   Altbaum   trustee
and ULTRONICS,   ("Payee"), at 396 "E" Street, Chula Vista, CA 91910, (or at such
other place as the Payee may designate in writing) the sum of   $262,500.00   plus
accrued interest of 6% annually; interest shall be paid quarterly with the final
interest and principal balance due and payable in full on December 31, 2010.

The unpaid   principal and accrued interest will be due (the "Due Date") in three
(3) years from the date of this agreement or an earlier date with no penalty for
earlier repayment.

Commencing 12 months after date hereof,   this three year Convertible   Promissory
Note, at the Payee's option,   may be p