Aiphone White Handset Sub For AT-406, Part# AT-306 Review Gobling May 10, 2018 August 29, 2018 No Comments on Aiphone White Handset Sub For AT-406, Part# AT-306 Review This fits your . Make sure this fits by entering your model number. AiPhone AT-306 Aiphone WHITE HANDSET SUB FOR AT-406, Part# AT-306