""Panasonic KX-TGA400B (Charger Not Included) The Panasonic KX-TGA400B (No Charger 4-line cordless handset works with the KX-TG4000B four-line cordless telephone system. The KX-TGA400B (No Charger)communicates with the KX-TG4000B base unit in both directions using 2.4 GHz frequency hopping spread spectrum (FHSS) transmission. FHSS technology improves calling range and clarity and eliminates crosstalk or eavesdropping. KX-TGA400B (No Charger) Features: 2.4GHz Extra Handset / Charger, GigaRange Digital FHSS Technology, 2-4 Line Operation, Caller ID / Call Waiting, Wall Mountable, 3-Line Backlit LCD Display, Lighted Keypad, 30 Station Name / Number Caller ID Memory, 50 Station Phone Directory / Dialer, 3-Way Conferencing, Adjustable Ringer / Volume Control, Adjustable Ringer Volume Control, Automatic Intercom, Call Transfer, 2-Way Paging, 94-Channel Frequency Hopping, Redial, Flash, Navigator Key, Up To 8 Hours Talk Time, Up To 96 Hours Standby, Low Battery / Out of Range Indicator, Headset Jack, Belt Clip - Included w/ Brand New Models, Important Difference Notice Will Not Work Without Base: KX-TG2000B or KX-TG4000B Additional Batteries For This Model Are: Panasonic HHR-P506""