Visaton-K-40-50-SQ-Square-Waterproof-Mini-Speakers-8-Ohm-4-5cm-Visaton-2846-P-A-waterproof-4cm-1-6in-square-miniature-speaker-from-Visaton-featuring-a-plastic-diaphragm-and-square-metal-basket-with-4-mounting-holes-Its-compact-dimensions-make-it-suitable-for-signal-output-in-machines-and-other-equipment-where-space-is-at-a-premium-IP-protected-on-front-side-when-built-into-a-sealed-enclosure-making-it-suitable-for-outside-and-harsh-environments-P-Visaton-2846-K-40-SQ-8-Ohm-Square