Quarterly report pursuant to Section 13 or 15(d)

6. Inventories, net (Details)

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6. Inventories, net (Details) - USD ($)
Jun. 30, 2020
Dec. 31, 2019
Inventory Disclosure [Abstract]    
Parts $ 53,534 $ 31,458
Finished goods 90,930 102,889
Inventory, gross 144,464 134,347
Less inventory reserve (75,527) (71,414)
Inventory, net $ 68,937 $ 62,933