From the Manufacturer
The MS600B is an intelligent tool that gives feedback while sanding. A three-position Zone Light Indicator communicates when the sander is working most efficiently for the best sanding results, eliminating inconsistencies and divots in your sanding projects. By sensing motor speed, the Zone Light will illuminate as single green light to indicate on and light sanding modes, a full green light indicates that you are applying proper amount of pressure for the best surface finish, and a red light illuminates when you apply to much pressure on the sander. The MS600B is also built with Auto Calibration, a feature which calibrates the three position indicator based on the incoming voltage from the power outlet each time you turn on the Mouse. This calibration step sets the zones to ensure consistent sanding performance regardless of the natural power fluctuations in your home. This also ensures optimal efficiency. The MS600B is a versatile sander that takes you from general sanding to sanding tight corners and curved shapes other sanders can't accomplish. A separate detail finger attachment sands deep into corners and other hard-to-reach areas. The MS600B is also sold with groove, outer-curve sanding attachments to sand curved shapes like chair spindles, dowels, recessed areas of woodworking projects, grooved surfaces and more. The MS600B is also sold with 12 sanding accessories and a storage bag.
2 Year Black & Decker Warranty. ZONE TOUCH TECHNOLOGY - 3 position LED indicator communicates optimal sanding pressure.
Auto Calibration - calibrates each zone position specific to your household power.
Compact, Lightweight design is an ideal shape for comfort & control