BW clip is the most user-friendly, reliable and cost-effective gas detector to ensure safety, compliance and productivity. Some of the key features of BW Clip gas detector include the followings: Perfectly Suited to monitor H2S, CO, O2 and SO2 gases Continuous operation up to three years from the time the device is powered on Maintenance-free No need for calibration, sensor replacement, battery replacement or battery charging Compatible with both the MicroDock II and the Intel