Hi I want to ask a qauestion .I have mi band 2 which is bluetooth band and i want to ask the tech guys if it produce any interference .Blue tooth is not discoverable buy any devices it is only paired with my phone no other device can see it....I want to ask if it emites any frequence while it is not paired with my phone...

if Bluetooth is turned on, even if the device is not paired, it may generate interference. it is advisable to turn Bluetooth off when flying Spark

Sorry to tell you that we would not recommend you use bluetooth devices when you fly your drone. Thanks for your support.