USB Nano receiver operating at 2.4GHz with power-efficient wireless technology Director A is the model. USB Nano Receiver interface AA#1/AAA*2 battery Systems that are compatible: Windows XP, Vista 7, 8, 10, 11, and Mac OS Key count: 105/106 Measurements: 432*195*30 mm Weight: 725 x 5 g Number of keys Mouse: 5+1 Resolution: DPI 800–1600 Measurements: 112*72*38 mm 7015g in weight