See also:

Dimensions and weights
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Call volume
Adjusting the incoming or outgoing call volume may improve clarity if reception between callers is unclear. - Incoming calladjusting this setting allows you to hear a difference in volume. - ...

Operating the HomeLink® Universal Transceiver
HomeLink Universal Transceiver (once programmed) may now be used to activate the garage door, etc. To operate, simply push the appropriate programmed HomeLink® Universal Transceiver button. T ...