Qolsys IQ Hardwire 16-F S Line, White
16 Zone Hardwire To Wireless Translator With 319.5 Mhz S-Line Encryption. Supports 2-Wire Smoke Detectors. Certified For Residential Fire. Learns Existing Eol Resistors, Built-In Power Supply, Backup Battery ChaRGing, and Relay For External Sirens or Speakers. Includes Transformer.