KS Wireless Bluetooth Earphone In Ear Hifi Sweatproof Sports Earbud Running Stereo Headphone Handfree Headset For Phone(Black)

Specification:   Model:KS VERSION Bluetooth version: V4.1 Frequency range: 20Hz-20KHz Working range: up to 33feet(free space) Support protocols: A2DP,AVRCP,HSP,HFP Talkiing time: about 4hrs Music time: about 4hrs Standby time: about 120 hrs Charging time: about 2 hrs Input voltage: 5V/>100mA Output power: 6mW+6mW Working environment: -10° to 50° Color: Black
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