Portable TWS Stereo Earbuds ST-40

version:5.0
Bluetooth profile: AVRCP/A2DP/HFP
transmission distance:10m playing time:2-3h
stand-by time:40h
Earphone capacity:45mAh
Charge case battery capacity: 250mAh
charging time;2h
trumpet:Ø10mm
sensitivity:110±3dB S.P.L at 1KHZ
impedance:32Ω
frequency range:20Hz-20 KHz

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