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Siemens Gigaset

Siemens Gigaset SL450A GO Twin

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Made with the finest materials: handset with aluminium frame German build quality Bluetooth enabled Gigaset GO to connect with your Smartphone

The Siemens Gigaset SL450A GO Twin Digital Cordless Phones: Top-range performance meets sophisticated style

Delivering top-class sound quality and elegant style, the new Gigaset SL450A Twin sets a new standard for cordless phones. The ultra-sleek handset features a luxurious aluminium frame and boasts future-proof sound technology allowing you to enjoy exceptional clarity whether connected to a traditional analogue line or VoIP.

Gigaset Made in Germany

German Build Quality

All Gigaset cordless phones are built in Germany to the highest standard. As the newest addition to Gigaset’s SL range of luxury home phones, the SL450A has been made with the best quality materials including the sophisticated aluminium frame on that handset and cradle.

Superior contact management

SL450A with HD SoundThe Gigaset SL450A GO Duo is the perfect set of home phones to upgrade to when it comes to contact management. Simply transfer your phonebook contacts from your smartphone using the Gigaset Contacts Push app (available for Android and iOS), or synchronise your contacts via Bluetooth or USB. The phonebook can handle up to 500 contacts with the flexibility of adding 3 numbers per entry.

Calls in High Definition

With HD sound for both analogue and VoIP lines, you can enjoy best-in-class call clarity and be guaranteed of natural voice quality from distortion, interference, or echoes. Both handsets include an integrated full-duplex speakerphone for hands-free, and are Bluetooth enabled so can be paired to a compatible Bluetooth headset.

Call blocking technology

With Gigaset’s Nuisance Call Blocking feature cold callers will become a thing of the past, allowing you to enjoy the conversations that matter on your phone. You can blacklist up to 15 specific numbers in addition to protection against anonymous callers.

Gigaset SL910A with Answering Machine

Manage your missed calls

The Gigaset SL450A manages missed calls efficiently with an integrated answer machine on the base. An ample recording time of up to 55 minutes will make sure you don’t miss any important messages even when you’re away for longer. And with Gigaset GO you can set up your smartphone so that you can receive notifications about missed calls and messages wherever you are.

Why should you buy these cordless phones?

If you’re looking for a top-class set of cordless phones that delivers on style, features, and sound quality then the Gigaset SL450A GO Duo are the perfect choice.

IP Features
No. of SIP accounts supported 6
No. of simultaneous/parallel calls supported 1 landine and 2 VoIP
RTCP support
HD Voice
Access to online phonebook
RJ45 LAN connection
For analogue line (BT, Virgin, TalkTalk, etc.)
For VoIP line
No of handsets 2
System can be expanded to 6 handsets in total
Answering machine Yes
Caller ID (Display):
Wall mountable base | additional handsets Yes | Yes
Range indoors | outdoors in metres up to 50 m | up to 300 m
Talk time | standby in hours up to 12 h | up to 300 h
Warranty 2 years
Advanced Features
Incoming call vibrate
Anonymous call blocking/silencing Yes | Nuisance Call Blocker
Repeater compatible


Headset compatible

Bluetooth, GAP and 2.5 mm headset

Data synchronisation Yes
Picture caller ID
Display & Keypad TFT | Yes
Screen size | Backlit 2.4 inch | Yes
Colour Yes
Backlit/ Illuminated Keypad
Date & time
Screensavers pre-installed | downloadable Yes
Out of range indicator | alert Yes | Yes
Low battery indicator | alert Yes | Yes
Phonebook features: Address, email, etc.
VIP contacts
Phonebook transfer
Additional features: Nuisance Call Blocker
Room/baby monitoring
HDSP Audio
Visual message / call indicator
Base Answering Machine
Record time 55
Remote access from outside line
SMS/email notification of new messages
Playback: handset| base Yes | No
Pre-recorded/ personalised outgoing message Yes | Yes
Protection of recording against power failure
Handset locator
Call management & sound
Call blocking
Call transfer between handsets
Call waiting
Conference call
Internal calls (intercom)
Hold | with music Yes | Yes
Last number redial
One-touch loudspeaker
Handsfree volume control
Call Duration displayed
List of last...missed calls with time/date 20
List of last...dialled numbers with time/date 20
Ringtones: melodies| polyphonic | real | downloadable 22
Technical information
Talk time 12 hours
Standby time 200 hours +
Handset dimensions (mm) H130 x W51 x D19
Base dimensions (mm) H132 x W105 x D46
Charger dimensions (mm) H70 x W59 x D29
Battery type Li-Ion
Transmission technology DECT & GAP
Languages 27

Top 7 Product Questions for Siemens Gigaset SL450A GO Twin

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Average Customer Review
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Customers most agreed on the following
Good points
  • Sound quality (5)
  • Looks good/design (4)
  • Easy to set up (2)
  • Easy to use (1)
  • Value for money (1)
Bad points
  • None (4)

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The most helpful favorable review

The most helpful critical review 25 of 25 people found the following review helpful

product reviewsproduct reviewsproduct reviewsproduct reviewsproduct reviews 4.9/5 Outstanding quality "Bought these to replace an old set of Panasonic phones that had finally given up the ghost. I'd seen something similar - think it was an older Gigaset model and was very impressed - and read some reviews online before ... Read the full review › Apr 01, 2016 by R. Hackman

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Product Manuals Siemens Gigaset SL450A GO Twin
Gigaset SL450A - User Manual.pdf

Siemens Gigaset SL450A GO Twin
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