Status LED

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The Status LED indicates that the unit is powered on, and displays battery level and other special status modes.

Normal Operation

When you first turn on the radio, you will see a specific power on signal.

  • Legacy Firmware: You will see one bold green blink.
  • E Release Firmware: You will see a red, green, red, green red sequence.

Under normal operation the LED will display a short green blink every 2 seconds after the power on signal. This is the normal “powered on and waiting for trigger” blink.

LED Blink

1 Green blink = More than 50% remaining

2 Amber blinks = Warning – less than 50% remaining

3 Red blinks = Less than 25% remaining – change immediately

FlexTT5 "Good Battery" BlinkFile:Example.jpg

See the Batteries section for more information.


A pulsing red LED in sync with TEST or a camera trigger indicates normal transmission.

Learn Mode

If TEST is held for 10 seconds, LEARN mode will be activated. See Learn Mode for information. A short red blink in sync with the camera’s trigger indicates normal transmission or reception.

Learning LED sequence: Holding TEST for 10 seconds will cause the unit to pulse red (continuously transmitting), then it will flash amber 4 times (indicating the beginning of Learn mode), then it will pulse amber while listening for a channel to learn. If it learns a channel, it will blink green 1, 2, or 3 times depending on the channel learned, then flash amber 1 more time to indicate LEARN is complete. If no channels are learned, the radio returns to normal “waiting for trigger” blinking. See LEARN Mode for more information.

Error Condition

Repeated red blinking indicates an error condition. Power off the unit, reseat all connections, and power back on. If the error persists, verify your settings. For example if you are using a Standard channel to trigger a FlexTT5 with a Speedlite in it set to E-TTL, this is an error. The flash needs to be set to manual (See Manual Mode for more information).

A normal green blink occurs on power up initialization and after Apply Settings has been pressed in the PocketWizard Utility.

Note that a single red blink when triggering is normal operation.


If TEST is held on power up then RESET A and RESET B can be performed. Two green blinks in a row indicate that RESET A was completed. Four green blinks in a row appear when RESET B has been completed. RESET A resets channels learned in the field back to those programmed via the PocketWizard Utility. RESET B sets the radio to factory default settings.