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1. Material: stainless steel2. Easy to replace, will not cause damage to the watch3. Comfortable to wear4. Fashionable and beautiful, bringing you ...
View full details1. Speaker size: 40mm 2. Impedance: 20 ohm +/-10% 3. Sensitivity: 100dB+/-3dB 4. Frequency: 20Hz-20KHz 5. Microphone size: 6.0x2.7mm 6. Microphone ...
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