BT4.1 Sporty bluetooth earphone RB-S2

Inner box: 7pcs
Bluetooth: V4.1+EDR
Profile Support: HSP / HFP / A2DP / AVRCP
Frequency Response:20-20kHz
Impedance: 16Ω;Sensitivity(SPL): 92±3db
Profile Support: HSP / HFP / A2DP / AVRCP
Operating distance: up to 10m (free space)
Talk / Music time: up to 6 hrs
Standby time: 200 hrs; Charger time: 2 hrs