Multi-Gas Detector Replaceable Battery Yes Product Type Multi-Gas Detector Display Screen Type Monochrome Includes Probe No Housing Color Gray Gas Detected Carbon Monoxide Hydrogen Sulfide LEL Oxygen Sulfur Dioxide Communication Protocol Bluetooth Series ALTAIR 5X Status Indicator LED Rechargeable Battery Yes Resistance Properties Radio Frequency Interference Resistant Sensor Type Photo Ionization Alarm Setting Adjustable Alarm Volume Level 95 dB Battery Life 20 hr