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Siemens Gigaset

Siemens Gigaset SL400A Twin

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this product has 74reviews 18questions


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Customer rating: 4.4 out of 5 | read 74 reviews or add a review

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Siemens Gigaset SL400A Price incl. VAT £109.99

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Siemens Gigaset SL400A Trio Price incl. VAT £269.99

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Siemens Gigaset SL400A Quad Price incl. VAT £349.99

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

Gigaset SL400A Design Award

Siemens Gigaset SL400A Twin: Stylish, high-performance digital cordless phones

With the award winning and compact SL400A, Gigaset delivers a top of the range DECT phone that impresses with style and functionality. Featuring a chic genuine metal keypad and frame, which is complimented by a high-resolution 1.8” TFT colour display, this eye-catching and luxurious contemporary phone is testament to Gigaset’s reputation for top-quality cordless phones.

Gigaset SL400A Cordless Phone

Feature rich

Boasting Bluetooth technology, the SL400A can be used to pair each handset with a Bluetooth headset for comfortable hands-free calls, and for easy synchronisation of your contacts with Outlook so you can conveniently keep your phonebook up to date. The SL400A further benefits from an integrated answering machine on the base with up to 45 minutes of recording time; allowing you to record important calls in addition to taking messages when you are not able to answer. Messages can be accessed remotely, and you can also set the answering machine to notify you by text as soon as a new message has been left so you can keep in touch even when you’re away.

Impeccable performance

Endorsed by Which? and consumers alike in response to the superior sound quality of the SL400; calls can be enjoyed in crystal-clear clarity free from feedback echoes and interference, even when using the hands-free loudspeaker. Each handset benefits from vibrate so you can set the ringer to silent and still be notified of incoming calls. And with a generous talk time of up to 14 hours, and dependable range of up to 50 metres indoors (300 outdoors), the SL400A provides reliable performance around the home or office.

Gigaset Made in Germany

Made in Germany

All of Gigaset’s phones are manufactured from their factory in Bocholt, Germany, and they pride themselves on the quality of their goods. As a top of the range model, the SL400A has been built from the finest materials and has undergone rigorous testing to ensure that it meets Gigaset’s exacting criteria for excellence. As an object of design as well as a function, the SL400A has been made to impress those who demand the best.

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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Siemens Gigaset SL400A Twin Siemens Gigaset SL400A Twin

Top 7 Product Questions for Siemens Gigaset SL400A Twin

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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)
  • None (2)
  • size (1)
  • Redial Ability (1)
  • No chrome base available as my other phones had (1)

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The most helpful favorable review 75 of 78 people found the following review helpful

product reviewsproduct reviewsproduct reviewsproduct reviewsproduct reviews 5/5 "A little more room on phone for adding more of your own ring tones and photos. You can send contacts from one phone to the other. And you can add your own rings tone using a data cable ... Read the full review › Aug 17, 2014 by blackdahlia

The most helpful critical review 21 of 22 people found the following review helpful

product reviewsproduct reviewsproduct reviewsproduct reviewsproduct reviews 4.3/5 Aesthetically Pleasing "It's well put together and doesn't look like a big kids phone, which appears to be the design of most DECT phones. Beautiful piece of technology Good software support Actually works as intended Pretty good sound quality Lithium Ion battery ... Read the full review › Dec 08, 2014 by Anonymous

read 1 review
Product Manuals Siemens Gigaset SL400A Twin
Gigaset SL400A - User Manual.pdf

Siemens Gigaset SL400A Twin
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