Summer - 1,5 til 13Vdc / 20-30mA, 105dB, 3 ledningerThe Velleman electric piezo buzzers are specifically designed for applications requiring a highly reliable alarm eller signal with a completely solid state og no electromechanical contact (oscillating circuit is built in). They are replacing the conventional electromagnetic buzzers because of their low effekt consumption, the extremely clear og penetrating sound, the absence of electrical noise, their compact design og their limited weight. A variety