Cover letter

FCC ID XVL123-RB4

FSRB4B

Sleep Performance, Inc. (dba Fatigue Science)

1. FCC ID
2. Sleep Performance, Inc. (dba Fatigue Science)
3. XVL123-RB4
4. Cover letter

Document ID #2924113

This document is available from the following links. Linking directly to FCC.gov may result in an error.

• https://apps.fcc.gov/eas/GetApplicationAttachment.html?id=2924113
• https://fccid.io/XVL123-RB4/Letter/Cover-letter-2924113
• https://fccid.io/XVL123-RB4/Letter/Cover-letter-2924113.pdf

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