The handheld Larson Davis Spark 706 RC Dosimeter features sound exposure dose measurement in a user-selectable set of parameters, a removable preamp microphone cable, and a LED graphic screen that displays testing mode, interface activity, battery power and memory statue. The 706 RC runs for over 100 hours of continuous use on just two AA alkaline cells. It’s compact construction is similar to the housing used in cellular phones. The 706 RC has enough onboard memory to perform a full weeks’ testing.