Sport 4.1 Bluetooth headset in blue color

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Power amplifier output power: RMS 2x18MW (THD=10%)
Power amplifier signal to noise ratio: ≥90dB
Input voltage: 3.7V rechargeable lithium battery
Play time: 3-4 hours talk time: 3-4 hours
Charging time: 1 hour
Charging input voltage: DC5V 500MAH
Speaker specifications: 2x16Ω 20MW Φ10mm
Frequency response range: 20Hz-20KHz
Sensitivity: ≥100db±2db
Signal to noise ratio: ≥80Db transmission/reception frequency: 2.4---2.48GHz Distance: 10m barrier-free