This monitor board is used to monitor the integrity of the speaker. It is used in conjunction with LBB 4440/00 monitoring control panel. The state of the speaker is transmitted to LBB 4440/00 through the existing speaker cable. The basic function LBB 4441/00 is installed in the speaker enclosure, and the state of the speaker is transmitted to the monitoring control panel of LBB 4440/00 through the existing speaker cable. The monitor board is used to detect and report the speaker failure within 300 seconds and the line failure within 100 seconds. Interconnection, 2 30 cm soft thread, two faston interface and recognized safety certificate conform to the standard IEC 60065 / EN 60065 immunity in accordance with EN 55103 ‑ 2 / EN 50130 / EN 50121 ‑ ‑ 4 standard cooling conform to EN 55103-1/4 FCC - 47 standard part b 15 emergency in accordance with EN 60849 / EN/ISO 7240 ‑ ‑ 16 16 standard 54 nautical comply with IEC 60945 Standard regional certified European CPR EU_CPR CE COC CE CertAlarm CE DOP GL install/configure the following speakers to install monitoring board: LC1 -- WM06E LBC 3210/00 LBC 3432/02 LC1 -- UM06E LA1 -- UM20E LA1 -- LS1 -- OC100E -- 1 -- LC1 -- UM12E LA1 -- UM40E -- LBC -- UM24E -- horn speaker LBC 3510/40 LBC 3406/16