Piezo element with aluminum shell The size of the piezo sounder with aluminum shell is 12mm, 15mm, 20mm, 27mm in diameter. It is mainly used in greeting cards, e-books, alarms, anti-lost devices, ultrasonic mosquito repellents and mouse repellents, etc. When customers design products that require sound components, design If the product space is small and the cost is low, the piezo sounder driver with aluminum shell can be used. The material of the piezo electric sensor can be selected from SMD and copper. The cost of iron is low, but it is easy to rust. The quality of copper is good, but the price will be higher. Two wires can also be welded, the color and length are customized by the customer! Sponge can also be added to the back of the piezo film , so that customers can easily install it on electronic products at low cost. Of course, this is a passive piezo element. If you need to sound, you need to add a drive circuit to work. If you need to redesign or customize the shell, you can contact FBelec engineers, whatsapp: 00860-18868647636