Feature: 1. FSK/DTMF COMPATIBLE: FSK/DTMF compatible. 24 different ringtones. Predial, correction, and delete functions. Record 62 (the largest incoming call) and 16 (the largest) outgoing number (8 digits). 2. RINGER VOLUME ADJUSTABLE: The phone is hands free. Redial function. LCD backlight.The ringtone volume is adjustable. The caller number, date, alarm clock, and time are displayed on the same screen, which is easy and convenient at a glance. 3. ENERGY SAVING: No battery, environmental protection and energy saving. It can be used without installing a battery, and can be used for dialing and answering. Subline interface, single interface extension line, can be directly used as the host. 4. FIXED HOLE ANTISLIP MAT: Fixed hole non slip mat, two non slip fixing holes, used in a shaking place to reduce movement or falling damage, non slip mat to reduce desktop friction. 5. 16 DIGIT LCD DISPLAY: Button design, clear hand feeling, contact and wear resistant, easy to dial and use. Incoming call screen, 16 digit LCD display, high definition display screen, LCD backlight. Specification: Item Type: Landline Material: ABS Model: KX-T2029CID Main Functions: Caller ID, Semi Hands Free, Battery Free, Extension Interface, 24 Ringtones Product Size: Approx. 210x160x95mm / 8.3x6.3x3.7in . Package List: 1 x Telephone1 x Telephone Receiver1 x Telephone Line1 x Handset Cord Note: Please allow 0‑1mm / 0‑0.04in error due to manual measurement. Thanks for your understanding.