This detector for hydrogen sulfide, carbon monoxide, oxygen and combustibles is as tough and functional as it looks. A rugged housing provides unsurpassed durability, including the ability to survive a 20-foot drop. With large, glove-friendly buttons and a high-contrast display, this unit is easy to operate in any work environment, even low-light conditions. XCell Sensors have a typical life of more than four years - double the industry average. These sensors are a breakthrough in chemical and mechanical sensor design, enabling faster response and span calibration times. Exclusive safety features like MotionAlert™ and InstantAlert™ make this detector ideal for applications like confined space entry. The MotionAlert sensor activates when a user becomes disabled and motionless, quickly alerting others to his location. The InstantAlert feature enables users to manually alert others to potentially hazardous situations. This instrument comes with a full three-year warranty - an entire year longer than the industry average. Unit includes data logging, charger, calibration cap and tubing.