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12. ACCRUED WARRANTY (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Accrued Warranty Details Abstract |  |
Beginning accrued warranty costs | $ 5,000 | $ 0
Cost of warranty claims | 47,454 | 5,731
Settlement of warranty claims | (22,454) | (5,731)
Ending accrued warranty costs | $ 30,000 | $ 5,000

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