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4. Property and Equipment
6 Months Ended
Jun. 30, 2017
Property, Plant and Equipment [Abstract]  
Property and Equipment

At June 30, 2017 and December 31, 2016, property and equipment consists of the following:

 

   June 30,
2017
   December 31,
2016
 
   (unaudited)     
         
Office equipment  $30,000   $28,000 
Furniture and fixtures   3,000    3,000 
Testing Equipment   37,000    18,000 
Subtotal   70,000    49,000 
Less accumulated depreciation   (36,000)   (32,000)
Total  $34,000   $17,000 

 

Depreciation expense for the six-month periods ended June 30, 2017 and 2016 was $4,000 for each period. Depreciation expense for the three-month periods ended June 30, 2017 and 2016 was $2,000 for each period.