NOTES Wireless Sports Headphones Bluetooth Version:4.1+EDR Support Protocol:A2DP, AVRCP, HFP, HSP Impendance:32 ohm ± 15% Sensitivity:108 dB Frequency Response:20Hz-20KHz Rated Power: 2.5WM Max Power: 5WM Battery capacity: 55 mAh Working time: 3-4 hours Standby time: 150 hours Charging time about 2 hours Samples sold are not returnable due to hygienic reasons. |