The BW Clip4 is a 4-gas personal gas monitor for H2S, CO, O2 and LEL. When you have your hands full and you need no-hassle gas detection you can count on the always on BW Clip4 as your choice. The BW Clip4 is a lightweight, wearable multi-gas detector that is always on. No charging, no battery replacements, no sensor replacements, no hassle. A simple low cost of ownership gas monitor backed by the guaranteed Honeywell commitment to quality and a full ecosystem of supporting technologies. When you turn the BW Clip4 on, you know its on with its two year continuous run-time.