KEBIDU Wireless Neckband Bluetooth Headset Black Stereo inEar Headphone Sport Earbud Earphone for Running

[Specification] Wireless Specification:v4.0 compliant CSR BCB Wireless Profile Supported:HSP v1.2,HFP v1.6.A2DP v1.2,AVRCP v1.4. Output Power Class:Class 2,up to 10-meter range Connection Function:Multipoint support for A2DP connection to 2 A2DP sources for music playback Wireless Technology:CSR’s latest CVC technology for narrow-band and wide-band voice connection Operating Voltage:1.8V/3.3V Audio Interface:Analogue,PCM,I2S Wired Audio Support:Line-in,USB Power Management:Lower power 1.35V operation for Bluetooth@ core Battery:Battery 3.7V/150mAh Li-Polymer Talk Time:Up to 13Hrs Music Play Time:Up to 13Hrs Standby Time:Up to 500Hrs Charging Time:Less than 2.5Hrs Operation Temperature:14?-140?(-10?-60?) Dimension/Weight:145mm(W)*170mm(L)*16mm(T)/50g Other Features:PCB antenna [Box Includes] 1*Wireless Stereo Headset 1*Charging Cable 1*Ear Rubbers(one pair) 1*User Manual