| Summary of product and recurring revenues disaggregated by industry | 
    |  |  | Hospitality |  |  | Education |  |  | Multiple Dwelling Units |  |  | Government |  |  | Total |  |  
    | Recurring |  | $ | 90,924 |  |  | $ | 10,460 |  |  | $ | 154 |  |  | $ | – |  |  | $ | 101,538 |  |  
    | Product |  |  | 1,249,228 |  |  |  | 227,507 |  |  |  | 19,441 |  |  |  | 7,482 |  |  |  | 1,503,658 |  |  
    |  |  | $ | 1,340,152 |  |  | $ | 237,967 |  |  | $ | 19,595 |  |  | $ | 7,482 |  |  | $ | 1,605,196 |  |  | 
| Summary of impacts of adoption of new revenue standard | The tables
below present the impacts of our adoption of the new revenue standard on our income statement and balance sheet.     
    |  |  | For
                                         the Three Months Ended  March
                                         31, 2018 |  |  
    |  |  | As
    Reported |  |  | Balance
                                         Without Adoption of ASC
                                         606 |  |  | Effect
                                         of Change
                                         Higher/(Lower) |  |  
    | Income Statement: |  |  |  |  |  |  |  |  |  |  |  |  |  
    | Sales |  | $ | 1,605,196 |  |  | $ | 1,708,196 |  |  | $ | (103,000 | ) |  
    | Cost of Goods Sold |  |  | 1,054,234 |  |  |  | 1,088,734 |  |  |  | (34,500 | ) |  
    | Net loss |  | $ | 1,184,166 |  |  | $ | 1,115,666 |  |  | $ | 68,500 |  |     
   
    |  |  | March
    31, 2018 |  |  
    |  |  | As
    Reported |  |  | Balance
                                         Without Adoption of ASC
                                         606 |  |  | Effect
                                         of Change
                                         Higher/(Lower) |  |  
    | Balance Sheet: |  |  |  |  |  |  |  |  |  |  |  |  |  
    | Assets |  |  |  |  |  |  |  |  |  |  |  |  |  
    | Contract Assets |  | $ | 644,479 |  |  |  | – |  |  | $ | 644,479 |  |  
    | Accounts Receivable, net |  |  | – |  |  |  | 65,400 |  |  |  | (65,400 | ) |  
    | Inventories |  |  | 843,488 |  |  |  | 1,046,335 |  |  |  | (202,847 | ) |  
    | Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  
    | Contract Liabilities |  |  | 1,670,616 |  |  |  | – |  |  |  | 1,670,616 |  |  
    | Customer Deposits |  |  | – |  |  |  | 199,483 |  |  |  | (199,483 | ) |  
    | Deferred Revenue - Current |  |  | – |  |  |  | 357,975 |  |  |  | (357,975 | ) |  
    | Deferred Revenue – Long Term |  |  | – |  |  |  | 238,426 |  |  |  | (238,426 | ) |  
    | Equity |  |  |  |  |  |  |  |  |  |  |  |  |  
    | Accumulated Deficit |  |  | – |  |  |  | 498,500 |  |  | $ | (498,500 | ) |        | 
| Summary of cumulative effect of changes made to consolidated balance sheet | The table
below presents the cumulative effect of the changes made to our consolidated balance sheet as of January 1, 2018 after the adoption
of ASU 2014-09.     
    |  |  | December
    31, 2017 |  |  | Transition
    Adjustments |  |  | January
                                         1,  2018 |  |  
    | Balance Sheet: |  |  |  |  |  |  |  |  |  |  |  |  |  
    | Assets |  |  |  |  |  |  |  |  |  |  |  |  |  
    | Contract Assets |  |  | – |  |  |  | 110,000 |  |  | $ | 110,000 |  |  
    | Inventories |  |  | 777,202 |  |  |  | 239,000 |  |  |  | 1,016,202 |  |  
    | Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  
    | Contract Liabilities |  |  | – |  |  |  | 779,000 |  |  |  | 779,000 |  |  
    | Equity |  |  |  |  |  |  |  |  |  |  |  |  |  
    | Accumulated Deficit |  | $ | (119,724,656 | ) |  |  | (430,000 | ) |  | $ | (120,154,656 | ) |    |