Quarterly report pursuant to Section 13 or 15(d)

6. Inventory, net (Details)

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6. Inventory, net (Details) - USD ($)
Mar. 31, 2020
Dec. 31, 2019
Inventory Disclosure [Abstract]    
Parts $ 53,820 $ 31,458
Finished goods 94,964 102,889
Inventory, gross 148,784 134,347
Less inventory reserve (71,603) (71,414)
Inventory, net $ 77,181 $ 62,933