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The Spark has been demonstrated to have reliable control and video transmission in excess of 2 km (1.2 miles) when flown in areas of minimal interference and obstruction. Due to it's small size, however, the Spark will essentially be invisible to the naked eye beyond about 100 meters (yards).
Sorry, there was a problem. Please try again later.DO not fly the unit over water it will become disconnected and land in the water. DJI will do nothing about this known issue
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