High-Performance 40mm Speaker4 impedance; 3W power handling; 020kHz frequency range; 102±3dB sound pressure output for clear and loud audio signals; Easy Integration for DIY ProjectsCompatible with Arduino and Raspberry Pi; no complex driving circuits needed; simple soldering or plug-in installation; Stable and Durable DesignIron frame construction; long service life; high pass rate; suitable for continuous use in smart home devices and advertising machines; Wide Application RangeIdeal for digital displays, security systems, printers, and audible alerts; reliable performance in low-power environments; Low-Interference OperationMinimal noise distortion; easy to calibrate; not for high-voltage (>50V) systems; ensures consistent sound quality across multiple uses