Spectralink Wireless Handset Feature Summary

The table below compares the feature availability between the Spectralink wireless handset phone range.

	General use			Specialised
Model	Butterfly	7520	7540	7420	7440	7480	7620	7640	7710	7720	7740

Loudspeaker hands free
Vibration
Headset socket
Colour screen
Navigation wheel
USB connection
Bluetooth
IP rating	None	None	None	None	IP54	IP64	IP64	IP64	IP54	IP64	IP64
Intrinsically safe
Rugged design
Alarm button
Tear off string

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