Use
Mouse M-R0063 + receiver C-U0008
The official G703 model/receiver pair.
Logitech lists both identifiers together in the G703 product specification.
Evidence note C091 · United States
Which replacement receiver works with a Logitech G703?
The receiver’s printed model number matters, but the final compatibility check happens inside Logitech G HUB—not in a marketplace title.
Direct answer
For G703 model M-R0063, start with receiver C-U0008.
Logitech’s G703 specification pairs mouse model M-R0063 with receiver model C-U0008. That makes C-U0008 the correct original receiver identifier, but it does not prove every loose or used receiver carrying that mark will pair with your mouse. Logitech says the selected receiver determines which devices the G HUB Device Pairing Tool will offer.
Decision map
What the identifiers actually prove
Family resemblance is not compatibility evidence. Each row stops exactly where the cited source stops.
Verify first
A loose C-U0008 receiver
Correct identifier; pairing still must be verified.
Logitech’s pairing tool determines compatible devices from the receiver that is actually plugged in. Printed model number alone does not complete that check.
Do not infer
A different Logitech receiver model
Do not infer compatibility from the brand or plug shape.
Logitech uses several receiver technologies. A visually similar USB receiver is not evidence that G HUB will offer the G703 as a pairing target.
Before buying
Run these checks in order.
- 01
Open the mouse weight compartment and confirm the mouse model is M-R0063.
- 02
Look for receiver model C-U0008 in the listing and in a clear photo of the actual receiver—not only in the seller’s title.
- 03
Buy only where you can return the receiver if G HUB does not list your G703 as compatible.
- 04
In Logitech G HUB, open Settings → Support → Device Pairing Tool, select the plugged-in receiver, and follow the compatibility list shown by the tool.
Primary evidence
Source links, not search snippets.
Evidence boundary
What this page does not prove
This page identifies the original model pair and Logitech’s official validation method. It does not certify a particular marketplace listing, guarantee that a used receiver is unpaired or functional, or claim that every receiver printed C-U0008 can be reassigned to every G703 revision.