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When a 2-in-1 receiver has connected and the transmitter has been in idle alarm state over 2 minutes, it will enter
the sleep mode.
• In this mode, the D1 LED will be in orange gradual light state, the buzzer and RF will turn o. The transmitter is not
responsive in case of operations of any control. To exit the sleep mode, power o the transmitter and restart it.
When the transmitter is in two-way mode, once it detects the bound receiver has turned o, or disconnected over
2S, the D1 LED will work in three-ash-one-o mode for prompt.
It is used to indicate the transmitter voltage state. It gives an alarm when the voltage is medium or low.
• Transmitter Voltage > 5 V: The D1 LED is solid on in green. 4.2 V < Transmitter Voltage < 5 V: The D1 LED is solid on
in orange. Transmitter Voltage < 4.2 V: The D1 LED ashes slowly in red and the buzzer beeps once shortly in Tone 1
cyclically.
It is used to indicate the voltage state of the connected receiver and alarm.
• For standard receivers, when the voltage is lower than 4.2 V, the D2 LED ashes slowly in red and the buzzer beeps
once in Tone 1 cyclically.
• For 2-in-1 receivers, when the voltage is high, the D2 LED is solid on in green; when the voltage is medium, the D2
LED is solid on in orange; when the voltage is low, the D2 LED is solid on in red and the buzzer beeps twice shortly
in Tone 1 cyclically; when the voltage is ultra-low, the D2 LED ashes slowly in red and the buzzer beeps for three
times shortly in Tone 1 cyclically.
This function is used to restore the transmitter to the factory default state.
• Press and hold REV and CH7 buttons of the transmitter and power it on. That is, restore to the factory default state.
When the setting is successful, the D1 LED quickly ashes in red for 3S and the buzzer sounds twice for seconds
with Tone 2.
5.12 Sleep Mode
5.13 Oine Prompt
5.16 Factory Reset
5.14 Transmitter Voltage Alarm
5.15 Receiver Voltage Alarm