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Average rating
Design
  • 4.7 / 5 stars
    0 reviews
Installation ease
  • 5 / 5 stars
    0 reviews
Options
  • 4.5 / 5 stars
    0 reviews
Sound quality
  • 4.7 / 5 stars
    0 reviews
Most helpful review

Product number
  • 703350
  • 367877
  • 334853
Manufacturer code
  • 20002749
  • KX-TG6821NLB
  • GIGNL-C530A-BLK
Brand
  • AVM
  • Panasonic
  • Gigaset
Warranty
  • 5 years
  • 2 years
  • 2 years
Warranty type
  • Carry-in warranty
  • Carry-in warranty
  • Carry-in warranty
Old product returned for free
  • Yes
  • Yes
  • Yes

Number of handsets included
  • 1
  • 1
  • 1
Caller ID
  • Yes
  • Yes
  • Yes
Caller ID type
  • Cable telephony (FSK), Regular landline (DTMF)
  • Cable telephony (FSK), Regular landline (DTMF)
  • Cable telephony (FSK), Regular landline (DTMF)
Mounting possible
  • No
  • No
  • Yes
Backlit keyboard
  • Yes
  • Yes
  • Yes
SMS
  • No
  • No
  • No
Conference call
  • Yes
  • Yes
  • No
Answering machine
  • Yes
  • Yes
  • Yes
Maximum recording time
  • 9999 min
  • 30 min
  • 30 min
Hands-free function
  • Yes
  • Yes
  • Yes
Vibrate function
  • No
  • No
  • No
Alarm function
  • No
  • Yes
  • No
Date and time display
  • Yes
  • Yes
  • Yes
Energy-efficient
  • Yes
  • Yes
  • Yes
Keypad lock
  • No
  • No
  • Yes
Internal call transfer
  • Yes
  • Yes
  • Yes
Contacts
  • Yes
  • Yes
  • Yes
Contacts capacity
  • 300
  • 120
  • 150
Sync contacts between handsets
  • No
  • Yes
  • Yes
Redial memory
  • 10
  • 10
  • 20
Design classification
  • Standard
  • Standard
  • Standard
Low radiation
  • Yes
  • Yes
  • Yes
Includes mounting materials
  • No

Integrated screen
  • Yes
  • Yes
  • Yes
Color screen
  • Yes
  • No
  • Yes
Touchscreen
  • No
  • No
  • No

VoIP
  • Yes
  • No
  • No
SIP
  • Yes
Maximum number of VoIP accounts
  • 9999

Connection type
  • Wireless
  • Wireless
  • Wireless
DECT protocol
  • Yes
  • Yes
  • Yes
Generic access profile (GAP)
  • Yes
  • Yes
  • Yes
Maximum number of handsets
  • 4
  • 6
  • 6
Outdoor DECT range
  • 300 m
  • 300 m
  • 300 m
Indoor DECT range
  • 40 m
  • 50 m
  • 50 m

Emergency button
  • No
  • No
  • No
Extra loud ringtone
  • No
  • No
  • No
Extra large buttons
  • No
  • No
  • No
Suitable for hearing aids
  • No
  • No
  • No

Base station height
  • 0 m
  • 7,7 cm
  • 4,3 cm
Base station width
  • 0 m
  • 10,7 cm
  • 12,6 cm
Base station depth
  • 0 m
  • 8,6 cm
  • 10,3 cm
Phone line type
  • VoIP
  • Analog
  • Analog

Handset height
  • 14,5 cm
  • 16,4 cm
  • 4,8 cm
Handset width
  • 4,8 cm
  • 4,8 cm
  • 15,6 cm
Handset depth
  • 1,8 cm
  • 2,9 cm
  • 2,7 cm
Color
  • Black
  • Gray
  • Black, Silver
Weight
  • 111 g
  • 129 g
  • 114 g

Power supply type
  • Battery
  • Battery
  • Battery
Replaceable battery
  • No
  • Yes
  • Yes
Standard battery type
  • Lithium-ion
  • AAA
  • AAA
Talk time
  • 10 h
  • 15 h
  • 12 h
Standby time
  • 12 days
  • 170 h
  • 180 h
Number of batteries included
  • 2
  • 2