The Helios KWL-SL 4/5 is a 5‑meter ribbon cable featuring RJ10 connectors on both ends, ideal for use with the KWL-BEC comfort control unit, as well as CO2, VOC (mixed gas), and humidity sensors. It also supports connections to KNX/EIB modules and expansion modules. This cable ensures secure and efficient data transfer, making it a vital accessory for Helios ventilation system integration and control.