Translations:KAVAN V20 + ETHOS™ - User manual/1022/en
From KAVAN RC Wiki
Before taking off, make sure the model responds properly to the gimbal movements on the transmitter. Also make sure all switches and other controls are functioning properly. If you find any problems, do not fly the model until all functions are working properly.
Never fly in rain, strong winds or at night. Water can cause failure or improper operation and impair the control of the model, with the risk of a crash.
