This is a self-oscillation device a electro-mechanical oscillator. An unusual transformer! It consist and is unique in the array of the magnets the coil and the reed switch. In my opinion is a L.C. circuit. The battery acts as a capacitor, induction that is created in the coil activates the reed switch,which starts to oscillate... br br If you like my Demonstration-Experiment click the "like" Button. SUBSCRIBE► SHARE with your Friends... Feel free to post your Positive or Negative comment! SUPPORT my "work" DONATE for materials & equipments - Magnets & Magnet Wires, Lab TOOLS & any other building supplies, variable Power Supply ect. This would HELP my Research. Stay Tuned and Enjoy! God Bless Thanks-ELEMAN. br br I want to thanks "Jozef Kutaj" for the gesture "donated" that helped me for this device. br br ALSO MUST SEE...