1.Material: ABS + UV + counterweight chip: Jerry 5.0.2. Frequency: 20 Hz ~ 20 kHz3. Impedance: 164. Sensitivity: 108 ? 2dB5. Distance: 10m-15m, service time: 60 hours6. Standby time: 3 months.7. Polymer battery, long battery8. Package size: 197 * 160 * 30MM weight: 103G
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