!
error Edifier

Error Code Red LED blinks twice every 5 minutes

Indicates Bluetooth connectivity issue or device is disconnected.

? What Causes This

Failed to establish a connection due to interference, distance or device unavailability.

How to Fix It

Move closer to connected device and try re-syncing via settings. If persists, contact support.

Source: page 2 of the official manual

From the manual

Manual page 2 — Edifier error Red LED blinks twice every 5 minutes

This error code appears in:

Edifier WH950NB Bk Wireless Noise Cancellation Over Ear Headphones