Logit explorer logit d105030 windows usb logit explorer light temperature sound measuring parameters lcd display usb interface 4 x aa battery power source an all in one solution for data logging which can be used for many different experiments 3 built in sensors for light temperature and sound plus 3 ports for a range of external sensors up to 3 sensors can be used simultaneously light sensor can also be used to time and calculate the speed of moving objects as well as a motion de