说明：  蓝牙5.0是由蓝牙技术联盟在2016年提出的蓝牙技术标准，蓝牙5.0针对低功耗设备速度有相应提升和优化，蓝牙5.0结合wifi对室内位置进行辅助定位，提高传输速度，增加有效工作距离。
(The Bluetooth Qualification Program Reference Document (PRD) is the primary reference document for the Bluetooth Qualification Program and defines its requirements, functions, and policies. The PRD is available on the Bluetooth Web site.)