k60-IV ♦ Highly sensitive sensor/ Rechargeable Lithium Battery/ three alarm methods/ IP67 >Technical Specification: Dimension 133 L×70 W×36 H mm Weight Approx. 300g Sampling Pump/ Diffusion Working Temperature - 10 °C ~ + 44 °C Environmental Humidity 15%~90% RH (non-condensing) Power 3.7V rechargeable lithium battery, continuously work for over 12 hours Sensor Life One year for combustible gas sensor; two years for oxygen and toxic gases sensor Display LCD display Alarm Mode