Harfington: About This ItemFlying distance:100 metersSize:Expand: 31.6X4.9X23.1cm Folding: 12.9X8X5.2cmtransmission distance:100 meters(no interference)Flying distance:Image following: 1-3 meters, shooting recognition: 1-3 metersFlight performance:20 minuteDiscount Percent: 42,