4 channels Wireless Smart Datalogger - Outdoor temperature, absolute distance with 150m full-scale and 1cm resolution, relative distance with ±30m full-scale and 0.1mm resolution related to a previously set-up offset or absolute distance with 6m full-scale and 0.1mm resolution - To be used with EDM laser - Double 5,8A/h - 3,6 V type “C” lithium internal battery for a battery life up to 3 years with samples every 60 minutes - IP65 sealing.