This is the manual of the product:
2W stainless-steel speaker unit
The 2W stainless-steel speaker unit is an independent digital speech unit designed for installation inside the elevator car or at landing floors.
The 2W digital-technology speaker units allows two-way communication with excellent audio quality and low consumptions.
The wide range of size and fittings combines functionality and versability in order to meet any installation requirement.
Quick and easy-to-install with only 2 wires, the speech units allows to combine active and passive speaker units.
The brand-new 2W speaker units are equipped with advanced self-diagnosis system to check constantly the system.