Clarity D613C Combo Pack (D613 with D613HS) * Clarity Power technology for loud and clear conversations * Amplifies incoming sounds up to 30 decibels * 30-name and number phonebook with 9 memory buttons * Expandable up to 5-handsets to 1 base * Call waiting/caller ID (activation required) * Hearing aid and T-Coil compatible with TIA-1083 compliance * Call screening, transfer, intercom and mute call functions * Large high-contrast and easy to press buttons with large caller ID display * Tri-lingual language support - English, Spanish, French