Mini Wireless USB Bluetooth-Compatible Dongle Adapter USB Receiver Transmitter
If you can'for t connect the receiver to the mouse, pls restarded the pc, reinstalled the software, unistall all mouse drivers.

for: G502 LIGHTSPEED Wireless Mouse

Specifications:
brand original new and
Color: Black
Material: Plastic
Quantity: 1PC

Package includes: (Without retail package)
1 x Usb Receiver