New power supply by Industrial Scientific, model CPS012062035 / 1810-6393. Comes with a type A plug adapter. No box. Output: 6.2VDC, 0.35A. Input: 100-240V, 50/60Hz, 0.3A. For use with several Industrial Scientific instruments including the M40 Multi-Gas Detector/Monitor. Industrial surplus from a closed plant in Montreal (Quebec, Canada).