The SV104IS noise dosimeter requires usage of a docking station for battery charging and measurement data download. The SA 104-5 docking station supports simultaneous battery charging and data download from up to five dosimeters. The instrument is positioned on the docking station with a holders system that ensures the correct position for battery charging. The SA 104-5 uses the external power supply for battery charging and USB cable for connection with PC. The data download from noise dosimeters is handled by the infra-red interface. The status of the dosimeter battery is indicated by the LED diodes located next to the handle system.