qolsys iq dw mini s-line encrypted door/window sensor qs1135-840 qolsys the iq mini dw-s is an ultra compact encrypted sensor that securely connects to the iq panel 2. using our proprietary s-line encryption technology, encrypts signals sent to the iq panel while still providing backwards compatibility for legacy 319.5 systems. easy to install on anything that opens or closes, the iq mini dw-s can provide intelligent notifications like "door left open" can be custom named, and can even support smart home rules like "when door opens, turn on light" or "when door left open adjust thermostat to save energy." boasting up to eight years of battery life, the iq mini dw-s uses an innovative board and antenna design to extend range and allow mounting on a variety of surfaces. the iq mini dw-s also includes a rare earth magnet for flexible mounting options in a variety of situations.