李旭洋 Published at: 2025-12-26

The transmitter works fine, but the receiver's connection is lost.

For Mars 400S Pro II
  1. Make sure to use a DC adapter or NP-F battery for the power supply, and the battery should be fully charged.
  2. Long-press the button in the middle of the transmitter to enter the menu interface, and then select "CHANNEL SCAN" to choose a clean channel to avoid frequency interference.
  3. Keep the transmitter at least 1m away from the receiver, and then enter the menu interface of both units for pairing.
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