PRISMA - S
Installation level: 
PRISMA-S - wireless siren's loudness will startle violators and attract the attention of neighbors and bystanders.
"PRISMA-S" wireless siren is an optional device which is sold & purchased separately and used either with the EXPRESS GSM 2 alarm device, the Photo EXPRESS E3 motion detector or GSM SMS (Smart Power Switch). It operates on a single lithium CR123A 3V battery up to one year. Its blaring siren (loudness 95dB) and flashing strobe light will scare off violators and attract the attention of neighbors and bystanders.
