Catalog > Consumer Electronics > Security & Alarms > Paradox Alarms Paradox Wireless Siren Wireless Siren 433MHz PDX SR150 (433) SR150 WIRELESS SIREN W STROBE LIGHT 433MHz {PA3815} Discontinued Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Features Built-in transceiver (433 MHz)100 db wireless siren, with integrated strobe lightWeather-resistant design, using a PC/ABS enclosure with UV protection and a silicone-coated PCB (-20°C to 50°C / -4°F to 122°F)Battery powered only – no need for AC powerFast alarm-response time (4 seconds)8-hour alarm display (strobe flashes every 4 seconds after bell cut-off )Siren presence supervised by control panelPanel presence supervised by siren (activates siren and strobe for 5 minutes if communication is lost)Triple tamper protection: wall, screw, and cover removalAssign up to 4 sirens per control panelIn-field firmware upgradable via 307USBSiren Test Mode4-LED signal strength and status displayStrobe lens available in 4 colors: red, blue, amber, or clearFully powered using three 1.5 Vdc, type D alkaline batteries (included); not required, but unit can also be powered using 8-16 Vac / 9-20 Vdc power supplyDimensions: 24 x 6 x 18 cm (9.5 x 2.3 x 7 in.)Compatible with MG5000, MG5050, MG6130, MG6160, and MG6250; also compatible with SP5500, SP6000, and SP7000, when using an RTX3