- Do not charge the device in temperatures above 40°C (104°F).
- Only use the supplied USB cable. Using a fast charger (9V/2A) can damage the internal charging circuit.
- The device will automatically shut down when battery voltage drops below 3.3V. Do not force restart; recharge immediately.
- Contact the Seller or Manufacturer: They may email you the manual.
- Look for Videos: Search for "Jie Rui BT 5908 setup tutorial" on platforms like YouTube.
- Consult Similar Models: Manuals for Jie Rui BT 588 or BT 5200 often have similar instructions.
4. Wiring and Connection Guide
- Pinout diagram description (power, ground, left/right audio, mic, button controls).
- How to connect to a battery or USB power source.
- Pairing instructions: LED patterns, button sequence.
Important: Do not connect the Red wire to car battery 12V without a voltage regulator unless the manual specifies "12V tolerant." Most BT 5908 units require 5V USB power.
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