This message was posted on behalf of Intel Corporation
AdtekHao: Thank you very much for contacting the Intel® NUC communities. We will do our best in order to provide the information you are looking for.
In regard to your inquiry, actually the Bluetooth version of the Intel® NUC6i5SYH is 4.0 and the range or coverage of it is approximately 60 meters:
Any further questions, please let me know.