Visonic Powermax - Batteria per sirena MCS-740, confezione da 2 : Amazon.it: Fai da te
Visonic Siren Battery for PowerMax Bell Box MCS-740 & SR-740 PG2, ER18505M Battery Packs for Extended Backup - Dual Battery for Greater Duration, 3.5Ah High Energy Density, Longer Lifespan (2 x 3.5Ah):
Visonic SR-720B PG2 PowerG Sans fil 2-Way Intérieur Siren with Strobe, Blanc