Amazon Kindle Fire HDX 7 vs Microsoft Surface Duo
| Type | A tablet | Other |
| Dimensions | 128.00 x 186.00 x 9.00 mm | 145.20 x 93.30 x 9.90 mm |
| Weight | 311.00 g | 250.00 g |
| Display size | 7.00" | 5.60" |
| Display | Color / TFT 16M colors 1920 x 1200 px (7.00") 323 ppi | Color / AMOLED 16M colors 60 Hz 1350 x 1800 px (5.60") 402 ppi |
| Display protection |   | Corning Gorilla Glass Buy screen protector
|
| Additional display | | Color / AMOLED 16M colors 1350 x 1800 px (5.60") |
| Protection of the secondary display | | Corning Gorilla Glass |
| Talk time (max.) |  | 4G: 1620 min. (27.0 h) |
| Stand-by (max.) | | 4G: 240 h. (10.0 days) |
| Playback time (max.) | nd | Video: 15,5 h (0.6 days) |
| PDA mode work time | 11 h (0.5 days) | nd |
| Standard battery | Li-Ion Buy powerbank
| Li-Ion 3577 mAhBuy powerbank
|
| Quick battery charging | | |
| Wireless battery charging | | |
| Internal memory | 16 GB | 128 GB, 256 GB |
| End-user memory | 8.8 GB | |
| RAM memory | 2 GB | 6 GB |
| Memory cards | | |
| Operating system | Fire OS 3.0 Mojito | Android 10 |
| Processor | Qualcomm Snapdragon 800 | Qualcomm Snapdragon 855 |
| Processor clock | 2200 MHz | 2840 MHz |
| GPU | Adreno 330 | Adreno 640 |
| Touchscreen |  | |
| DualSIM | | |
| SIM cards standard | | DualSIM(eSIM, nanoSIM) |
| DualSIM mode | nd | dual standby |
| Hybrid DualSIM | nd | |
| Announced | 4Q 2013 | 3Q 2020 |
| Other names | - | - |
| GSM frequencies | 850 900 1800 1900 | 850 900 1800 1900 |
| UMTS | | 850 900 1900 2100 |
| LTE standard | | FDD LTE: 2600, 2300, 2100, 1900, 1800, 1700, 900, 850, 800, 700 TDD LTE: 5200, 2600, 2500, 2300, 1900 |
| Standard 5G | | |
| CDMA | 850 CDMA2000 1xEV-DO | |
| Standard TD-SCDMA | | |
| UMA | | |
CAMERAS - BACK
| First camera | | |
| Camera type | | Standard |
| Photo matrix | | 11 Mpx |
| Optical zoom | | |
| Digital zoom | | 7x |
| Field of view | | 84 ° |
| Flash | | |
| Dual-colour LED flash | | |
| Video resolution | | 3840x2160 px |
| Video formats | H.263, H.264, MPEG4 | H.264, H.265, MPEG4 - 60 fps |
| Additional | - | AF, EIS, f/2.0 |
CAMERAS - FRONT
SENSORS
| Accelerometer | | |
| Proximity | | |
| Light | | |
| Magnetometer | | |
| Gyroscope | | |
| Barometer | | |
| Altimeter | | |
| Gravity | | |
| Hall-effect | | |
| Iris scanner | | |
| Fingerprint scanner | | |
| Thermometer | | |
| Hygrometer | | |
Data transfer
| xHTML | | |
| WAP | v2.0 | |
| HSCSD | | |
| HSDPA | 42.00 Mbit/s | 42.20 Mbit/s |
| HSUPA | 5.76 Mbit/s | 5.76 Mbit/s |
| HSPA | | |
| HSPA+ | | |
| LTE DL | | 1174.00 Mbit/s |
| LTE UP | | - |
| WIMAX+ | | |
| GPRS | | |
| EDGE | | |
| Bluetooth | | v5.0 |
| A2DP Profile | | |
| HDMI | | |
| WiFi | v802.11 a/b/g/n | v802.11 a/b/g/n/ac |
| WiFi frequencies | 2,4 GHz | 2,4 GHz; 5 GHz |
| WiFi Direct | | |
| WiFi Display | | |
| DLNA | | |
| Miracast | | |
| WiFi hotspot | | |
| IrDA | | |
| USB | v2.0 | v3.1 Type-C |
| GPS | | |
| A-GPS | | |
| GLONASS | | |
| Beidou | | |
| Galileo | | |
| QZSS | | |
| NFC | | |
COMMUNICATION AND MESSAGING
| Call waiting | | |
| Conferency | | |
| Call forwarding | | |
| Push To Talk | | |
| Instant Messenger | | |
| SMS | | |
| EMS | | |
| MMS | | |
| Dictionary | | T9 |
| Swype | | |
| e-mail client | POP3, IMAP4, SMTP | POP3, IMAP4, SMTP |
| Hardware QWERTY keyboard | | |
| RSS Reader | | |
Multimedia
| Radio | | |
| MP3 | | |
| Stereo speakers | 2 | |
| Audio Jack | 3.5 mm | |
| HD Voice | | |
| Sound formats | AAC, AMR, OGG, WAV | 3GP, AAC, AMR, FLAC, IMY, M4A, MID, MIDI, MKV, MP4, OGG, OTA, RTTL, RTX, TS, WAV |
| Polyphony | | |
| Video ringtone | | |
| Ring composer | | |
| Games | | |
| Java | | ART |
| Videophone | | |
| DVB-H television | | |
| TV-Out | | |
PIM AND ADDITIONAL FUNCTIONS
| Watch | | |
| Stopwatch | | |
| Alarm | | |
| Calculator | | |
| Currency converter | | |
| Organizer | | |
| Calendar | | |
| Flight mode | | |
| SyncML | | |
| Data and fax | | |
| Screensaver | | |
| Themes | | |
| Interchangeable covers | | |
| Voice dial | | |
| Speakerphone | | |
| Recorder | | |
| Vibrations | | |