The compact mouse for on the go is supplied with bluetrack sensor and a retractable 24 ghz nano receiver that can be tucked in the bottom of housingbluetrack technologythe bluetrack technology from microsoft brings together the performance of optical technology with the precision of lasers the result is remarkable tracking on almost all surfacesplug and go nano transceiversimply plug in the nano transceiver while you are travelling or tuck it in the mouse 8 months battery lifeuse your m