Any notice required or permitted by this Agreement or the Note shall be in writing and shall be deemed sufficient upon receipt, when delivered personally or by courier, overnight delivery service or confirmed facsimile, or 48 hours after being deposited in the U.S. mail as certified or registered mail with postage prepaid, if such notice is addressed to the party to be notified at such party’s address or facsimile number as set forth below or as subsequently modified by written notice.  The Company covenants that in the event that any Purchaser gives notice of their exercise of the Warrants, the Company will promptly notify all other Purchasers of such exercise.