blueman software package provides Graphical bluetooth manager, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install blueman
blueman is installed in your system.
Make ensure the blueman package were installed using the commands given below,
$ sudo dpkg-query -l | grep blueman *
You will get with blueman package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | X Window System software |
| Package | blueman |
| Version | 2.0.4-1 |
| Description | Graphical bluetooth manager |
| Sub Section | x11 |