User ManualTable of ContentsAbout this Document2Table of Contents1Declaration of Conformity2Download of the user guide2Compliance to FCC US/CAN3Introducing the ARF374Product Description4Accessories5Getting Started7Keyboard Description7Function Usage8Using the Screen and Keyboard8Setting a Conference10Assigning a Number to a Device10Changing the intensity of the noise filter11Changing Hopping frequency table11Enabling Devices to Enter a Conference12Using the Devices14Using the Listener Mode14Validating or Unvalidating Other Devices Listening14Setting the Volume15Locking or Unlocking the Keypad15Reloading the Battery16Troubleshooting17Size: 117 KBPages: 19Language: EnglishOpen manual