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Siemens Gigaset

Siemens Gigaset SL400A Sextet

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Customer rating: 4.6 out of 5 | read 72 reviews or add a review

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1.8” high-resolution TFT colour display High-quality genuine metal frame and keypad Answering machine with up to 45 minutes recording time Data synchronisation

Siemens Gigaset SL400A Sextet: A top-range set of 6 designer cordless phones

Gigaset SL400A Cordless Phone Design Awards

At first glance it is easy to see why the Gigaset SL400A has been the recipient of the prestigious iF design award – with each handset boasting an eye-catching, luxurious metal keypad and frame, and large 1.8” high-resolution TFT colour display, the SL400A Sextet is the epitome of a style when it comes to a set of modern home phones. Fully equipped with the latest features, and endorsed by Which? for sound quality and performance, Gigaset delivers a high-specification set of phones likely to impress.

Gigaset SL400A Cordless Phone

Intuitive organisation

Conveniently synchronise contacts with Outlook using the USB port or via Bluetooth so you can easily transfer numbers to your Gigaset SL400A, which has a phonebook memory of up to 500 contacts (each with space for 3 numbers per entry). And with the facility to upload photos, you can personalise your contacts and see who is calling with picture Caller ID. Whilst the expert mode enables you to customise the menu to include the most regularly used features giving you easy access to the functions relied on most.

Superior sound quality

Renowned for their crystal-clear sound clarity, which has continually seen Gigaset phones the first choice for discerning users and top the Which? Best Buy Guides, the SL400A is no exception.Gigaset SL400A High Sound Performance Featuring their pioneering HSP™ technology, the SL400A enables calls free from feedback echoes and interference, even when using the loudspeaker so you can always hear and be heard.

Efficiently manages missed calls

Details on the last 50 missed calls are stored on the handset allowing you to call back and/or save new numbers to the phonebook. And the integrated answering machine provides a generous recording time for up to 45 minutes of messages. The advanced functionality of the answering machine includes an intuitive skip-back function so that you can easily replay the last few seconds of a message if you happen to miss an important detail. And if you are going to be out you can set up the SL400A to notify your mobile by SMS whenever a new message has been recorded; you can then dial in and listen to messages remotely so you can always be connected.

Gigaset SL400A Cordless Phone

Why should you buy these cordless phones?

The Gigaset SL400A Sextet are a high-spec, contemporary, and elegant set of DECT phones ideally suited for both home and office use; living up to its premium price by delivering premium quality and style.

For analogue line (BT, Virgin, TalkTalk, etc.)
Advanced Features
Incoming call vibrate
Anonymous call blocking/silencing Anonymous call silencing
Repeater compatible


Headset compatible
  • Via Bluetooth
  • Via GAP
Hearing Aid Compatible via Bluetooth
Large buttons/font No | Yes
Data synchronisation Yes
Picture caller ID
Screen size | Backlit 1.8
Colour Yes
Backlit/ Illuminated Keypad
Date & time
Screensavers pre-installed | downloadable Yes | Yes
Out of range indicator | alert Yes | Yes
Low battery indicator | alert Yes | Yes
Space per entry 3 numbers; First and last name; Anniversary with reminder; VIP ringtone; Picture
VIP contacts
Phonebook transfer
Room/baby monitoring
Night Mode
Base Answering Machine
Record time 45
Remote access from outside line
SMS/email notification of new messages
Playback: handset| base Yes | No
Pre-recorded/ personalised outgoing message Yes | Yes
PIN protected
Protection of recording against power failure
Handset locator
Call management & sound
Call transfer between handsets
Call waiting
Conference call
Internal calls (intercom)
Hold | with music Yes | Yes
Last number redial
One-touch loudspeaker
Earpiece volume control 5 levels
Handsfree volume control
Call Duration displayed
List of last...missed calls with time/date 20
List of last...dialled numbers with time/date 20
Two-way recording
Ringtones: melodies| polyphonic | real | downloadable 5 | 3 | 15 | Yes
Technical information
Talk time 14 hours
Standby time 200 hours +
Handset dimensions (mm) 120.8 x 46 x 16
Base dimensions (mm) 117 x 115 x 47
Charger dimensions (mm) 49 x 126.2 x 60.5
Battery type Li-Ion
Battery capacity 750 mAh
Transmission technology DECT & GAP
Frequency band 1.88 to 1.90 GHz
Languages Yes (21)
Why not save up and get great accessories? Select from additional handsets, wireless headphones, or go for extra long range with a DECT repeater

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Main Product
Siemens Gigaset SL400A Sextet Siemens Gigaset SL400A Sextet

Top 7 Product Questions for Siemens Gigaset SL400A Sextet

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of customers would recommend this product
Average Customer Review
more score details
Customers most agreed on the following
Good points
  • Easy to read screen (7)
  • clear voice (5)
  • Lightweight (5)
  • long lasting (3)
  • Easy to use (2)
Bad points
  • None (2)
  • maximum volume is low (1)
  • Volume inadequate (1)
  • size (1)
  • Redial Ability (1)

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The most helpful favorable review

The most helpful critical review 33 of 35 people found the following review helpful

product reviewsproduct reviewsproduct reviewsproduct reviewsproduct reviews 4.6/5 Best phone there is! "I have a good eye for design and this is by far and away the best land line phone on the market. Build quality, ease-of-use, style, fits nicely in the hand, far superior to any other make of phone Not ... Read the full review › Jan 04, 2014 by The Fish

read 72 reviews
Product Manuals Siemens Gigaset SL400A Sextet
Gigaset SL400A - User Manual.pdf

Siemens Gigaset SL400A Sextet
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