Bluetooth alarm speaker - silent ultra long standby - Fresh green - B131
Product color: White Pink Green
Bluetooth version: 5.0
Bluetooth distance: 10-20m (barrier free)
Battery: 3.7V 18650 cells
Charging input: 5v-2a
Full frequency of horn: 50mm * 1 full frequency
Distortion: 1-5%
Signal to noise ratio: ≥ 75db
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