C.R.S. § 4-2.5-515

(1) Acceptance of goods occurs after the lessee has had a reasonable opportunity to inspect the goods and: (a) The lessee signifies or acts with respect to the goods in a manner that signifies to the lessor or the supplier that the goods are conforming or that the lessee will take or retain them in spite of their nonconformity; or (b) The lessee fails to make an effective rejection of the goods (section 4-2.5-509 (2)). (2) Acceptance of a part of any commercial unit is acceptance of that entire unit.