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Siemens Gigaset SL400 / SL400A / SL400H

alaTest has collected and analyzed 953 reviews of Siemens Gigaset SL400 / SL400A / SL400H. The average rating for this product is 4.1/5, compared to an average rating of 4.0/5 for other Cordless Phones for all reviews. Reviews about the reliability and price are overall positive. The design and size are also appreciated.

usability, size, design, price, reliability

We analyzed user and expert ratings, product age and more factors. Compared to other Cordless Phones the Siemens Gigaset SL400 / SL400A / SL400H is awarded an overall alaScore™ of 81/100 = Very good quality.

Review analysis

(Based on 953 reviews)

Expert Reviews  

User Reviews  

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Consumer review ( review summary for Siemens Gigaset SL400 / SL400A / SL400H


alaTest has collected and analyzed 95 user reviews of Siemens Gigaset SL400 / SL400A / SL400H from The average user rating for this product is 4.4/5, compared to an average user rating of 4.1/5 for other Cordless Phones on Reviews about the reliability and size are overall positive. The design and usability are also mentioned favorably. Opinions are divided on the price.

usability, design, size, reliability

91% of the reviews on give this product a positive rating.

This summary is based on the products: Gigaset SL400A Single DECT Bluetooth Cordless Phone - Black / SilverGigaset SL400A Single DECT Bluetooth Cordless Phone - Black / Silver

Aug, 2018

Expert review by (

Gigaset SL400A single review

  (Rating Hidden)

Sleek, compact and Bluetooth enabled the Siemens Gigaset SL400A is a premium digital cordless phone. An attractive design object with an integrated answering machine and a host of advanced features including: a large phonebook, hands-free speakerphone...

Nov, 2010

Consumer review (

Great phones, but...

  (Rating Hidden)

We bought 2 Gigaset SL400A twins, as we need four phones and couldn't find anyone selling the quad version. They are great phones, which are very easy to use and set up. One of our main reasons for choosing them was the ability to transfer contact...

Apr, 2013

Consumer review (

Beautifully designed phone

  (Rating Hidden)

i'm very pleased with this phone. It is beautifully designed and made and for me, being able to site the phones anywhere in my house without the need for installing phone cable runs is really important. The sound quality is excellent, and the...

Oct, 2011

Consumer review (

Siemens Gigaset SL400A


The charger cradle is totally separate from the transmitter. So you can have the transmitter hidden away next to the phone line connection point, and the charger cradle somewhere handy, in a different room Can send & receive texts just like a mobile

Mar, 2016

Consumer review (

Siemens Gigaset SL400A


Feels like a quality product. Looks good. Separate base to phone stand is good

The volume is too low if background noise in room where phone is being used. Speakerphone echoes your voice

Feb, 2016

Consumer review (

Siemens Gigaset SL400A


The clarity and clearness of conversations no matter where in the world the calls are made.

No bad points

Dec, 2015

Consumer review (

Siemens Gigaset SL400A


It's like having a mobile phone,light,slim loads of extras on it.

Oct, 2015

Consumer review (

Siemens Gigaset SL400A


Clear reception whether your calling out or receiving a call

Dec, 2014

Consumer review (

Siemens Gigaset SL400A


It's links up via Bluetooth with hearing aids

Quite small, difficult with poor sight

Jul, 2014

Consumer review (

Siemens Gigaset SL400A


These handsets are just quality. Far superior to the plastic of other phones.

Costly but you pay for what you get. First two sets also had scratches on screen which was disappointing as had to return twice.

Jan, 2014

Product Specifications

Call management

Call log entries:20
Call screening: Yes
Call timer: Yes
Call waiting: Yes
Caller ID:No / Yes
Calling line identification presentation (CLIP):Y / Yes
Conference call: Yes
Redialing:Y / Yes
Speed dialing: Yes


Compliance industry standards:DECT, GAP
Specific absorption rate (SAR) value (EU):0.1


Backlight buttons:Y / Yes
Colour of product:Aluminium / Black / Black, grey / Black, Metallic / Black, Silver / Silver
Elderly phone: No
Integrated antenna: Yes
Mounting type:Ceiling / Desk / Wall/Desk


Backlight colour:White
Backlight display:Y / Yes
Built-in Display:Y / Yes
Display diagonal:4.57
Display number of colours:65536 colours
Display number of lines:128 / 7 / 8
Display Resolution:128 x 160 / 160 x 128
Display size (HxV):30 x 37 / 3251.2 x 4064 / 38 x 32
Display size (HxV) (imperial):3251.2 x 4064


Battery capacity indicator: Yes
Battery charge indicator:Y
Battery charging indication: Yes
Battery full indication: Yes
Battery low indication: Yes
LED indicators: Yes
LED on base: Yes
LED on handset: Yes

Management features

Add new contacts from handset: Yes
Alarm Clock:Y / Yes
Answerphone remote access: Yes
Calendar: Yes
Clock with calendar: Yes
Image gallery: Yes
Navigation key:Y / Yes
Phonebook sharing: Yes
Volume Control:Digital


Call list capacity phonebook:20
Phonebook capacity:500
Redial list capacity:20
SMS storage capacity:612
User memory phonebook:Y

Operational conditions

Operating relative humidity (H-H):10 - 85 / 20 - 75
Operating temperature (T-T):10 - 35 / 5 - 45

Other features

Birthday & anniversary info:Y
Bluetooth: Yes
Channels quantity:60
Charging source:AC
Compatible operating systems:- Windows XP / Vista / 2007\n- Mac OS X 10.4.9
Dimensions (WxDxH):120.8 x 46 x 16
Ethernet LAN (RJ-45) ports:1
Frequency band:1.88 - 1.9
Internet connection required: Yes
Mac compatibility: No
Networking standards:IEEE 802.3
Resolution:160 x 128
USB 2.0 ports quantity:1
VIP caller identification:Y
VoIP protocols:Y
Wall mountable: Yes

Packaging Content

Analog line cable: Yes
Base station: Yes
Belt clip: Yes
Cables included:AC, LAN (RJ-45)
Charger: Yes
Ethernet cable: Yes
Manual: Yes
Number of handsets included:1
Quick start guide: Yes


Answering Machine:N / No / Yes
ECO mode: Yes
GAP compatible:Y / Yes
Handset type:Wireless handset
Intercom: Yes
Keypad illumination:Y
Maximum indoor range:50
Maximum outdoor range:300
Recording Time:45 / 50045 / 55
Ringer type:Polyphonic
Type:Analog/DECT / DECT / DECT telephone

Phone features

Babyphone function:Y / Yes
Dialer location:Base & Handset / Handset
Dialer type:DTMF
Downloadable ringtones:Y / Yes
Microphone mute: Yes
Multi base capability:1
Multi handset capability:1 / 6
Night mode: Yes
Number of melodies:15 / 23 / 5
Number of SMS Boxes:4 / 50
Polyphonic ring: Yes
Short Message Service (SMS): Yes
Speakerphone:No / Y / Yes
Vibrating Alert: Yes
VIP group function:Y / Yes
VIP group with own melody:Y / Yes

Ports & interfaces

DC-in jack: Yes
Headphone connectivity:2.5 mm
Headset connectivity:2.5 mm / Bluetooth
Interface:Bluetooth / Bluetooth, mini-USB
Plug and Play: Yes
Wireless Connection:No / Y / Yes


Battery Capacity:750
Battery recharge time:3
Battery technology:Lithium-Ion (Li-Ion)
Battery Type:V30145-K1310-X445
Input frequency:50
Input Voltage:230
Number of Batteries Supported:1
Power consumption (typical):0.6
Power requirements:230V, 50Hz
Standby time:230
Talk Time:14

Technical Details

Clock/Date display: Yes
Keypad illumination: Yes

Weight & Dimensions

Base dimensions:115 x 47 x 117 / 117 x 115 x 47 / 132 x 46 x 105
Base weight:120 / 166
Handset dimensions (WxDxH):46 x 121 x 16 / 46 x 16 x 120.8 / 46 x 16 x 121
Handset weight:100 / 112
Height :12.1