Get the convenience and flexibility of a custom phone system for an off-the-shelf price with this four-line phone system that expands to up to 16 cordless base stations. Easy-to-install system can expand to accommodate the needs of growing businesses. Each base station can also be paired with a cordless accessory handset (sold separately) for added mobility and convenience. Professional features make it easy to manage calls and contacts. Headset and hearing aid compatible. Base model plus Caller ID and digital answering system. Answering System: Digital; Lines: 4; Telephone Type: Corded;Cordless.