This additional handset is exclusively for use with the KX-TGE220EN Digital Cordless Telephone Panasonic's KX-TGEA20EN additional handset is designed primarily for ease-of-use and consistent call clarity. The large keys are illuminated for comfortable, simple dialing, and a wide backlit LCD display is easily readable from any angle. Noise reduction and hearing aid compatibility ensure the conversation is always clear, while the hands-free function allows you to sit back and chat by speakerphone. Noise Reduction The KX-TGEA20EN employs Noise Reduction to cut out some of the background noise from the other side of the conversation. It's great if you're talking to someone who's in a busy street or has children playing nearby as it will isolate their voice, making it easier for you to hear. Hearing Aid Friendly This phone is compatible with hearing aids, meeting the TIA-1083 compliance standard. So every conversation is clear and interference-free. Nuisance Call Blocker Clamp down on spam calls from telemarketers by blocking specific numbers (or entire groups based on the first 2 to 8 digits) or withheld numbers. This means that your home can be left in peace from bothersome distractions. Do Not Disturb Mode Not only can you put this phone on a silent Do Not Disturb setting, you can customise it so it rings for specific contacts. This means that your sleep will only be disturbed by loved ones or other special callers. With this convenient feature, this set will sink seamlessly into your lifestyle even more. Eco Mode One Touch Eco Mode gives you a simple yet effective way of preserving power. By pressing the ECO button, signal output is greatly reduced, helping you save energy and money on your energy bills.