Panasonic KX-TG 6721

: Wireless landline phone, DECT/GAP standard

: Monochrome backlit LCD on the handset, 2 lines; displays name/number, status, time, and alarm

: 1.88–1.90 GHz (DECT); 120 duplex channels; automatic selection of the least congested channel; TDMA; digital encryption

: Supports both standard Caller ID and voice-announced Caller ID; incoming call log (up to 50 entries)

: Up to 100 contacts; names up to 16 characters (Latin/Cyrillic); numbers up to 32 digits

: Digital answering machine with up to 30 minutes of recording time

: Not supported (the base station requires a 220–240V mains power supply)

: Not supported (blocking must be managed via the telephone exchange/service provider)

: Available (automatically lowers volume or mutes the ringer during specified hours)

: Available (digital speakerphone on the handset)

: Baby monitor function; intercom between handsets; conference calling; SMS; alarm clock; keypad lock; any-key answer; handset locator; last-number redial

: Classic "handset + base" form factor; wall-mountable base; plastic casing; large buttons; backlit handset keypad; visual call indicator

: Base station; handset rechargeable batteries (2×AAA, Ni‑MH); power adapter; RJ‑11 telephone cable; user manual

: ~85 × 155 × 65 mm (W×H×D; may vary slightly by model version)

: up to 50 m indoors, up to 300 m outdoors

: supports additional handsets — up to 6 handsets per base (compatible with certain Panasonic models, e.g., KX‑TGA671)