Translations:KAVAN Smart PRO TW30 Power switch with telemetry - Instruction manual/17/en
From KAVAN RC Wiki
Safety information
Always operate the TW30 in a dry environment and within the device limits stated in this guide. Never expose the device to excessive heat or cold.
Do not remove the heat shrink tube from the device and do not try to implement any changes or modifications. This can lead to total destruction and to the denial of any warranty claims.
Always check the polarity of the cables. Never inverse the polarity – this could lead to total destruction.