Buzzer

"Buzzer Powered by Bicycle Wheel — No Battery Needed!" 00:07
"Buzzer Powered by Bicycle Wheel — No Battery Needed!" Inventor Gc 5,820,886 55 лет назад
The Buzzer (4625kHz) – LIVE -1:-1
The Buzzer (4625kHz) – LIVE The Buzzer Channel 5