diff --git a/docs/Buzzer.md b/docs/Buzzer.md
index a0ab3d4a47..642ec566ca 100644
--- a/docs/Buzzer.md
+++ b/docs/Buzzer.md
@@ -20,13 +20,14 @@ Examples of a known-working buzzers.
 
  * [Hcm1205x Miniature Buzzer 5v](http://www.rapidonline.com/Audio-Visual/Hcm1205x-Miniature-Buzzer-5v-35-0055)
  * [5V Electromagnetic Active Buzzer Continuous Beep](http://www.banggood.com/10Pcs-5V-Electromagnetic-Active-Buzzer-Continuous-Beep-Continuously-p-943524.html)
- 
+ * [Radio Shack Model: 273-074 PC-BOARD 12VDC (3-16v) 70DB PIEZO BUZZER](http://www.radioshack.com/pc-board-12vdc-70db-piezo-buzzer/2730074.html#.VIAtpzHF_Si)
 
 ## Connections
 
 ### Naze32
 
-Connect a supported buzzer directly to the BUZZ pins. Observe polarity.
+Connect a supported buzzer directly to the BUZZ pins. Observe polarity. Also if you are working with flight controller outside of a craft, on a bench for example, you need to supply 5 volts and ground to one of the ESC connections or the buzzer will not function.
+
 
 ### CC3D