diff --git a/TESTED.md b/TESTED.md
index 4871396..32248a3 100644
--- a/TESTED.md
+++ b/TESTED.md
@@ -16,3 +16,4 @@ This is not by any means an exhaustive list. Many more devices are supported but
 |      T400      |     Yes     |        `Zone Touch Mouse T400`         |
 |    MX Keys     |     Yes     |      `MX Keys Wireless Keyboard`       |
 |      M500s     |     Yes     |     `Advanced Corded Mouse M500s`      |
+|      M650L     |     Yes     |       `Signature M650 L Mouse`         |
diff --git a/example_logiM650Lmouse.cfg b/example_logiM650Lmouse.cfg
new file mode 100644
index 0000000..a5de31a
--- /dev/null
+++ b/example_logiM650Lmouse.cfg
@@ -0,0 +1,25 @@
+devices: ({
+name: "Signature M650 L Mouse";
+// Example for the Logitech Signature M650 L Mouse that remaps the left side front button to right shift 
+// and left side front button to right control keys to use for keymaps in games
+// note, holding down the button acts like holding down the shift or ctrl keys
+
+// A lower threshold number makes the wheel switch to free-spin mode
+// quicker when scrolling fast.
+smartshift: { on: true; threshold: 20; };
+
+hiresscroll: { hires: true; invert: false; target: false; };
+
+// Higher numbers make the mouse more sensitive (cursor moves faster),
+dpi: 1500;
+
+buttons: (
+
+// back thumb button 8.
+{ cid: 0x53; action = { type: "Keypress"; keys: ["KEY_RIGHTCTRL"]; }; },
+
+// front thumb button 9.
+{ cid: 0x56; action = { type: "Keypress"; keys: ["KEY_RIGHTSHIFT"];    }; }
+
+);
+});