Features include:• Two months of battery runtime on a 4.5-hour charge with the new low-powered IR LEL sensor. No daily charging, no unexpected downtime• Low-power infrared LEL sensor is immune to silicone poisoning, which means accurate monitoring of combustibles.• The IntelliFlash™ green light indicates when the detector is in compliance and the amber light indicates the need for maintenance.• 1series sensors respond to dangerous gas levels in seconds, even in harsh temperatures.• Small, lightweight and wearable. One-button operation.• 3-year warranty