Audio
Audio power
20 W
Speakers
2
Sound processing
- Dolby Atmos
- DTS Virtual:X
- DTS TruSurround
Other features
- Sound by Onkyo
- 5-band equaliser
- Supports High-Resolution Audio
Connectivity
Audio output
- Optical x 1
- 3.5 mm jack x 1
Connections
- HDMI 2.1 x 3 (eARC compatible)
- USB 2.0 x 2
- PCMCIA slot x 1
WiFi
Yes
Ethernet
Yes
Bluetooth
Bluetooth 4.2
Screen
Screen technology
LED directlit
Resolution
4K Ultra HD 3840 x 2160p
Screen size
55"
HDR
- Dolby Vision
- HDR10
- Hybrid Log Gamma (HLG)
Native contrast ratio
1300:1
Picture enhancement
- TRU Picture Engine
- TRU Micro Dimming
- TRU Flow MEMC
Noise reduction
Yes
Response time
9 ms
4K Ultra HD compatibility
- Video CODEC: HEVC H.265
- TRU Resolution 4K upscaling picture enhancement
Contrast
Peak brightness: 350 nits
Processor
Quad-core processor
Refresh rate
60 Hz
Gaming technology
HDR game mode
Tuner
Electronic programme guide
7-day EPG and 7-day catch up with Freeview Play
TV tuner
Freeview HD

Please note: Some services are only available in the UK
Features
Table-top stand
Yes
VESA mount
200 x 200
Other features
- Sleep timer
- Parental lock
Remote control
Fire TV Voice Remote
Smart
Smart TV services
- Catch up TV: BBC iPlayer, ITV Hub, All 4, My5, UKTV
- Streaming: Netflix 4K, Prime Video 4K, Apple TV, Disney+, BT Sport, Google Play, NOW TV, Britbox
- Music: Apple Music, Spotify
- App store: Fire TV
- Custom homepage
- Full internet browser
- Social media: YouTube 4K, TikTok

Please note: Some services are only available in the UK
Screen mirroring
Miracast (iOS / Android)
Smart platform
Fire TV
Voice controlled assistant
Amazon Alexa via TV or remote
General
Colour
- TV: High gloss black
- Stand: Titanium silver
Internal menu languages
23 languages
Guarantee
1 year
Weight
- TV with stand: 16 kg
- TV: 13 kg
- Boxed: 21 kg
Dimensions
- TV with stand: 755 x 1243 x 249 mm (H x W x D)
- TV: 720 x 1243 x 81 mm (H x W x D)
- Boxed: 860 x 1369 x 154 mm (H x W x D)
Box contents
- Toshiba Fire TV 55UF3D53DB 55" Smart 4K Ultra HD HDR LED TV
- Remote control
- Batteries
- TV stand
- Screws
- AC power cable
- Quick start guide
Material
- TV: Plastic
- Stand: Aluminium