RF-ECHO - Internal Sounder - Wireless Application The Internal wireless RF siren is suitable for use with all SecureWave2-way Wireless Systems including the SW 1070, SW 20140, and Quantum 70. The siren is extremely neat and aesthetic with no compromise on performance; Specification Fully wireless, comes with battery pack Housing: ABS Hinged lid Finish Standards Downloads RF-ECHO - Internal Sounder - Wireless (.pdf, 55 kB) RF-Echo (.pdf, 148 kB) Close RF-SABB-B / RF-SABB-R - External Sounder - Base Blue or Red