The structure of the multitone sounder CWSO-RR-W1 is identical to that of the Sounder CWSO-RR-S1, but the CWSO-RR-W1 comes with a deep base. On the two flattened sides of the base, 3 openings (Ø19mm) can be broken out so that PG screw connections can be inserted. Thanks to the robust design, the sounder is suitable for use under harsh environmental conditions