Sentry The Guardimals Owner's Manual page 76

10.0 Operation and Adjustments
3. Check that the Harness Straps are snugly
adjusted. The harness strap is properly
tightened if you are not able to insert more
than one finger between the harness strap
and the child's shoulder or thigh.
To loosen harness or lengthen the harness strap:
1. Unbuckle harness.
2. Loosen built-in safety harness by
pressing the Harness Adjuster Button
and pulling the harness assembly
toward you
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