Sensor-Arduino Active Buzzer:

• The Keyes KY-012 Active Buzzer Module is compatible with Arduino, and produces a single-tone sound when the incoming signal is high.
• The KY-012 Active Buzzer Module is an excellent option if you're searching for a straightforward yet efficient solution to include audio in an electronics or Arduino project.
• Its basic function is to just emit a single tone sound when the incoming signal is high.
• In order to create a custom alarm or detection system that can emit an audio signal upon receiving the electronic high signal from the Arduino controller board, this enables single-pin operation on an Arduino Board.

Specifications:

• Operating Voltage: 3.5V - 5.5V
• Maximum Current: 30mA @ 5VDC
• Resonance Frequency: 2.5kHz ±300Hz
• Minimum Sound Output: 85dB @ 10cm
• Working Temperature: -20°C to 70°C
• Storage Temperature: -30°C to 105°C
• Dimensions: 18.5 x 15mm