GFG Combustible Gas Detector Exotector G 624 P With Case Ch4 This item was purchased from an inventory surplus sale. We do not know the history of it. It is also marked, "EX s, I G5 BVS Nr. T 6725 Z2" The scale is marked, "CH4". It is in good cosmetic condition. It does not come with an A/C adaptor and the battery is dead at this time and so we are not able to test it. The case is in good condition with all the latches and hinges working as they should. It only comes with what is shown in the pictures. wf E2-7 E10-10 d 8127178 rl fdk 81208221