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Guide to powering, pairing, music playback, call handling, volume, and mute functions.
Step-by-step instructions for pairing the headset with mobile devices via Bluetooth.
Instructions for connecting the RKING4000 headset to two devices simultaneously.
Explanation of LED indicator lights for various operational states like charging and pairing.
Details on how to charge the headset, including connections and approximate charging duration.
List of conditions confirmed by voice prompts on the headset for user feedback.
Key specifications including Bluetooth version, chipset, range, battery, and physical dimensions.
Answers to common questions regarding connection, pairing, charging, and operational issues.
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General