The Microsoft 2.4Ghz Black Dongle Transceiver v7.0 Model 1423 OEM Genuine is a wireless receiver designed for mice, trackballs, and touchpads. It features optical tracking method, ergonomic design, and USB connectivity. The dongle transceiver is genuine and authentic, made by Microsoft and manufactured in China. This unit is essential for offering a convenient and efficient wireless experience for users who prefer a compact and stylish accessory for their computer or tablet.