Murata PKHPS0013E40 Piezoelectric Sounders/Buzzers use frequency control technology to achieve a sound pressure level comparable to medium- or large-size sounders. The compact size, ø12.6mm x 9.4mm, allows miniaturization of mounting space with no decrease in sound output. The Murata PKHPS0013E40 Piezoelectric Sounders/Buzzers are available in tape and reel packaging for automatic mounting. These devices are ideal for consumer and industrial applications.