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Siemens Gigaset

Siemens Gigaset SL400

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this product has 11reviews 3questions


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Customer rating: 4.4 out of 5 | read 11 reviews or add a review

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Siemens Gigaset SL400 Twin Price incl. VAT £179.99

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Siemens Gigaset SL400 Quad Price incl. VAT £349.99

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Siemens Gigaset SL400H Price incl. VAT £84.99

1.8” high-resolution TFT colour display High-quality genuine metal frame and keypad Bluetooth functionality Data synchronisation

Siemens Gigaset SL400: Elegant design, sophisticated sound & top-class features

Gigaset SL400 Cordless Phone Design AwardsThe Siemens Gigaset SL400 is an eye-catchingly stylish digital cordless phone, which was the recipient of the iF design award and rated by Which? as Best Buy. Featuring a genuine metal finish and clear 1.8” high quality TFT display, the SL400 looks and performs like a top-range phone should. With useful DECT features to take advantage of (such as Bluetooth, Picture Caller ID, phonebook synchronisation, and more), this is the ultimate landline phone without an answering machine.

Data synchronisation

The generous phonebook with a memory to store up to 500 names (each with space for 3 numbers, email address, and anniversary) can be conveniently synchronised with contacts on your PC or laptop via Gigaset’s QuickSync Software. You can also use this to import images (to use as screensavers, or Caller ID) and music files that you’d like to use as a ringtone.

Gigaset Sound Quality

Top quality

Gigaset are pioneers of DECT technology, and pioneered their own sound protocols (HSP™ & HDSP™ technology) to enhance the sound quality above that of a standard landline phone. As such, the SL400A delivers exceptional clarity of sound whether using the ear-piece or integrated loudspeaker. Gigaset SL400 Cordless PhoneThe SL400 also bares the stamp of ‘Made in Germany’, as a mark of exacting standard to which it was built. All Gigaset phones are manufactured from their factory in Bocholt, Germany, and have undergone rigorous testing to ensure they are of top quality.

Efficient DECT features

Delivering a range of up to 50 metres indoors and up to 300 outdoors, you’ll be able to enjoy calls around your home with the Gigaset SL400 without any deterioration in sound quality (the SL400 is also repeater compatible if you need extra long range or live in a property with thick walls). Details of the last 50 missed calls are stored on the handset, and when accessed allows you to conveniently call back and/or save numbers into the phonebook. The SL400 further benefits from a reliably long lasting battery life, which provides a continuous talk-time of up to 16 hours and over 200 hours on standby.

Why should you but this phone?

If you’re looking for a stylish landline cordless phone without an answering machine; the Gigaset SL400 is a phone that is as good as it looks delivering great sound, useful features & reliability.

For analogue line (BT, Virgin, TalkTalk, etc.)
No of handsets 1
System can be expanded to 6 handsets in total
Answering machine No
Phonebook Up to 500 entries (3 numbers per contact)
Keypad/touchsceen Yes | No
Caller ID (Display):
Wall mountable base | additional handsets Yes | No
Range indoors | outdoors in metres 50 | 300
Talk time | standby in hours 14 | 230
Warranty 2 years
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" | Yes
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
Playback: handset| base -
Pre-recorded/ personalised outgoing message -
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
PSU length -
Line cord length -
Battery type Li-Ion
Battery size Other
Battery capacity 750 mAh
Transmission technology DECT
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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add Plantronics C565  to packagePlantronics C565
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add Siemens Gigaset Repeater 2.0 to packageSiemens Gigaset Repeater 2.0
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add RTX Repeater  to packageRTX Repeater
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Your Package Tailor your package to suit your requirements and watch the savings pile up

Main Product
Siemens Gigaset SL400 Siemens Gigaset SL400

Top 7 Product Questions for Siemens Gigaset SL400

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of customers would recommend this product
Average Customer Review
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Customers most agreed on the following
Good points
  • Easy to use (2)
  • Looks good/design (2)
  • Sound quality (2)
  • Value for money (2)
  • Easy to set up (1)
Bad points
  • None (2)
  • Heavy (1)
  • button visibility (1)
  • No chrome base available as my other phones had (1)

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The most helpful favorable review 6 of 8 people found the following review helpful

product reviewsproduct reviewsproduct reviewsproduct reviewsproduct reviews 4.9/5 Best Home Phone Purchase "I bought my SL400 telephone so I could have a separate base station which fits into my cupboard in our hallway. My handset its on its own in my lounge and it is fantastic! This is by far the best ... Read the full review › May 30, 2014 by Sara M

The most helpful critical review


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Product Manuals Siemens Gigaset SL400
Gigaset SL400 - User Manual.pdf

Siemens Gigaset SL400
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