Designed for radio-controlled sailboat racing.  Now equipped with LoRa control board with one-mile range and 200ft Bluetooth LE range.  (LoRa range is between buoys, not between phone and buoy.  You will need a buoy nearby to act as a hub/translator to control distant spoke buoys.)
 
Available colors:  Orange, yellow, green, red, white, blue
Weight 5 lbs
Height 13 inches
diameter 11 inches
Battery type LiPo, 2S (8.4V)
Battery capacity 5 Amp-hour
Idle power consumption 130mA
Now equipped with LoRa control board
    Bluetooth range 200ft
    LoRa range 5000ft
Radio control input capable (2-channel)
Brushless motors with sealed bearings
Warrantee:  One year