The ATS1522N bidirectional audio slave satellite is an auxiliary audio device for the ATS1521N addressable bidirectional audio satellite, used for the verification of audio alarms. Depending on the variant of the control panel and the firmware, up to 32 ATS1521N satellites may be installed in the protected facilities and connected to an Advisor Advanced panel with the ATS1520 bidirectional audio module and the ATS7700 PSTN module installed. There can be up to 3 ATS1522N slave satellites connected to the two-way audio satellite. ATS1521N. Or a mixture of a maximum of four ATS1521N and ATS1522N on the communications bus. Minimum sound level at 10 meters distance: 55dB. Dimensions: 157x91x34mm. Temperature: -10 to 55ºC.