5 Pcs DC 5V Electronic Continuous Sound Buzzer 12x9.5mm Compact, reliable audible alert for 5V control circuits. These continuous sound buzzers produce a steady tone when supplied with DC 5V, making them suitable for status indicators, alarms, and feedback in electronics projects. Key benefits Readytouse pack of five for multiple projects or replacements. Simple integration: operates from a standard 5V DC supply common in microcontrollers and control circuits. Continuous tone output provides clear, consistent alerts for status, warning, or feedback signals. Small footprint saves space: 12 x 9.5 mm physical size designed for compact enclosures and crowded PCBs. Durable housing with exposed terminals for straightforward soldering or connector attachment. What it does and why you might need it Provides an audible signal whenever 5V power is applied, helping you detect events, errors, or operational states without a display. Helps save troubleshooting time by giving immediate sound feedback during testing and development. Useful when visual indicators are not practical or when an audible confirmation improves usability. Compatibility and function Designed for 5V DC systems and compatible with 5V outputs from microcontrollers and control boards. Connect directly to a 5V supply or drive from a digital output capable of sourcing or sinking the required current. Continuous sound functionality: the buzzer emits a steady tone while powered, rather than a pulsed or intermittent chirp. Size and installation Physical dimensions: 12 x 9.5 mm, suitable for tight mounting spaces. Terminals are exposed for soldering to a PCB or attaching to connector wires. Ideal for panel mounting inside enclosures or fixed to a compact PC board. Performance and materials Produces a clear audible tone suitable for alerts and indicator functions. Encased in a compact plastic housing with metal terminals for electrical connection. Low component count and simple operation minimize points of failure. Practical applications Electronics prototyping: add audible feedback to microcontroller projects, development boards, and learning kits. Security and alarm systems: provide continuous alarm tones for door sensors, intrusion alerts, or equipment fault notifications. Consumer devices and appliances: use as status indicators in timers, vending machines, or household gadgets where a steady alert tone is required. Installation tips Verify the correct voltage before connecting. These buzzers are designed for 5V DC operation. Observe any polarity markings on the component or wiring to ensure proper function. If driven by a microcontroller pin, confirm the pin can supply the required current or use a driver transistor as needed. Package contents Five DC 5V continuous sound buzzers, each sized 12 x 9.5 mm. This product provides a straightforward audible signaling solution for 5V electronic systems where space is limited and reliable continuoustone alerts are required.