Fully serviceable gas detector with real-time gas reading. Max readings for the current operating session. One button operation. Large backlit display. Loud alarm (92dBA @ 1 foot). Alkaline version is rated IPX5/IPX7 against water ingress. NiMH version is rated IPX5 against water ingress. RFI immunity to 40 V/m. Top & front mounted bright LED. Security beep (selectable via PC). Programmable warning and danger alarms (via PC). Alkaline model runs up to 13 hours on 2 AA batteries. NiMH model runs up to 15 hours between charges.