Panasonic BB-GTA150B Globarange Additional Handset for the BB-GT1540B & BB-GT1500B Telephone Systems (US) NOTE: No Returns and No exchanges will be accepted. 5.8GHz Extra Handset. Digital FHSS Technology. Voice Over Internet Protocol (VoIP) - Computer Not Required. Dual Mode Functions as VoIP and Standard Phone. Caller ID / Call Waiting. Hearing Aid Compatible. Speakerphone. 3-Line Backlit LCD Display.