1. [Mute & Redial Function] This wall phone features mute and redial functionality, offering versatile button operation. 2. [Conference Interface] The wall phone allows holding the current call for another incoming call. Its simple interface extension cable allows for direct use as a host. 3. [2 Mounting Holes] The landline phone has 2 non-slip mounting holes, ideal for use in shaky locations to prevent movement, drops, or breakage. 4. [Oval Button Design] The corded landline phone features an oval button design for a clear, tactile, durable, and user-friendly experience. 5. [Battery-Free] Environmentally friendly and energy-saving; no batteries are required for operation – simply plug in and start making calls.