Led Status Interactions - Empatica E4 User Manual

LED status interactions

The E4's LED light
Yellow light indicates the battery is charging (connected) or low.
Green light indicates device start-up and Bluetooth discovery mode.
Purple light indicates recording has started*.
Blue light indicates data streaming has started*.
*Note: During sessions the light powers off after 40 seconds to save power.
Purple (recording)/Blue (streaming) lights are displayed for 1 second after a button tap/event mark.
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will generally appear BLACK.
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