diff --git a/doc/bt_manual_v10.md b/doc/bt_manual_v10.md
index d55efb6dc..448986302 100644
--- a/doc/bt_manual_v10.md
+++ b/doc/bt_manual_v10.md
@@ -33,7 +33,7 @@ Built-in battery can support standalone mode, off-line sniffing, off-line readin
 
 *	Unplug your Proxmark3 RDV4.0 device from any usb cable.
 *	Remove the plastic upper case of Proxmark3 RDV4.0 with opener.
-*	Remove temporarily the antenna with a H5 screwdriver to expose the FPC interface.<p>
+*	Remove temporarily the antenna with a H5 (Hex/Allen) screwdriver to expose the FPC interface.<p>
 	<img src="https://sneaktechnology.com/wp-content/uploads/2019/06/FPC-Interface.png" alt="Image of blue shark add-on fpc interface" width="300"></p>
 *	Turn off all power switches, insert the FPC wire into the FPC connector, and lock the FPC connector.<p>
 	<img src="https://sneaktechnology.com/wp-content/uploads/2019/06/FPC-Connected.png" alt="Image of blue shark add-on fpc wire" width="300"></p>