- Cordless handset for the Panasonic KX-TGD81x and KX-TGD83x Series. This is not a standalone product and will not work without a compatible Panasonic base unit. - 1-touch Call Block Button on the handset to manually block unwanted callers - Full duplex speakerphone lets you use your handsets hands-free; Use the handset and base unit on speakerphone for a home intercom system; keep a handset in baby�s room to use as a monitor - Illuminated keypad with large easy-to-read characters is findable and readable even in the dark - Wall-mountable design option keeps phone reliably close