This is an authentic Logitech Wireless USB Receiver, Model C-BT44 (P/N: 810-001147). This receiver is primarily used for Logitech desktop combos such as the EX-100. It features an integrated long USB cable to allow for better placement on your desk, ensuring a strong, uninterrupted wireless connection for your mouse and keyboard.

Specifications

* Brand: Logitech

* Model: C-BT44 / 810-001147

* Connectivity: 2.4GHz Wireless

* Interface: USB Type-A

* Compatibility: Logitech EX-100, EX-110, and similar legacy Cordless Desktop sets.

Pairing Instructions

To pair this receiver with your existing Logitech devices:

* Plug and Play: Insert the USB cable into an available port. Windows should recognize the device automatically (verified on my PC).

* Syncing: Press the "Connect" button on the top of this receiver.

* Device Setup: Immediately press the small "Connect" button located on the bottom of your mouse or keyboard.

* Repeat: If syncing both a mouse and keyboard, repeat the process for the second device.

Condition & Testing

* Status: Pre-owned in good physical condition. The cable is flexible and free of frays.

* Test Results: I have plugged this into my PC and confirmed that the system recognizes the receiver immediately.

* Note: I do not have the specific EX-100 peripherals to perform a final button-press test, so it is sold as-is but confirmed to be "seen" by computer hardware.