Specification: Dimension:0.47X0.37"/12x9.5mm(Dx H). Material: PPO. Operating Voltage:2.5-4V. Rated Voltage:3V. Current: greater than 25mA. Operating Temperature:-20 - 70 Centigrade. Storage Temperature:-30 - 80 Centigrade. This component is ideal for adding noise to your project and is compatible with 2.54mm pin pitch and for use with microcontrollers such as the Arduino. This component allows you to respond to programmatic changes with a cute, annoying buzzer that can be changed over a range of frequencies to ensure maximum stimulation. Package included: 10 x Electromagnetic Active Buzzer