This mouse uses a USB wireless dongle, sometime it is hidden under the battery compartment. It isn't bluetooth.
Manufacturer Marshall Electronics
Brand Microsoft
Product Line: Microsoft Wireless Mobile Mouse
Model: 3500 for Business
Interface: 2.4 GHz
Notebook Mouse
Max Operating Distance: 33 ft
Wireless Receiver: USB wireless receiver
Buttons Qty: 3
Movement Resolution: 1000 dpi
Movement Detection Technology: Optical
Performance: 8000 fps
Features Battery indicator, Microsoft BlueTrack Technology, On/off power switch, Rubber side grips, Scrolling wheel
Orientation: Right and left-handed
Interfaces: 1 x USB - 4 pin USB Type A
Form Factor: AA type
Technology: Alkaline
Run Time (Up To) 8 months