M100 Product Registration Form June 10, 2025 12:39 Updated Please use the link below to register your M100 earbuds. https://www.cambridgeaudio.com/register Related articles Where can I find the serial number for my M100? What is the latest firmware version for the M100? M100 Safety Manual Cambridgeaudio.com money-back risk-free returns Azur 551R V1/V2 User Manual, IR Codes & Technical Specification