Powerful Sound Quality: Hammer Airflow 2.0 has powerful 10 mm sound drivers for a great sound experience Ergonomic Design: These wireless earphones are suitable for long comfortable use Passive Noise Canceling: These wireless headphones can block out most of surrounding noises with ear buds Portable Case: Earphone case is designed with 300 mAh battery, which can charge your Hammer Earbuds at least 4 times
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