Redmi Watch 4 vs Redmi 9 Activ
| Type | - | Touch |
| Dimensions | 47.58 x 41.12 x 10.50 mm | 164.90 x 77.07 x 9.00 mm |
| Weight | 31.50 g | 194.00 g |
| Display size | 1.97" | 6.53" |
| Display | Color / LTPS AMOLED 60 Hz 390 x 450 px (1.97") 302 ppi | Color / IPS TFT 16M colors 60 Hz 720 x 1600 px (6.53") 269 ppi |
| Display protection |   | |
| Additional display | | |
| Protection of the secondary display | | |
| Standard battery | Li-Po 470 mAhBuy powerbank
| Li-Ion 5000 mAhBuy powerbank
|
| Quick battery charging | | |
| Wireless battery charging | | |
| Internal memory |  | 64 GB, 128 GB |
| RAM memory | | 4 GB, 6 GB |
| Memory cards | |  microSD, microSDHC, microSDXC up to 512 GBBuy memory card |
| Operating system | HyperOS | Android 10 |
| Interface | - | MIUI 12 |
| Processor | - | MediaTek Helio G35 MT6765G |
| Processor clock | - | 2300 MHz |
| GPU | - | PoverVR GE8320 @680 MHz |
| Touchscreen | | |
| DualSIM | | |
| SIM cards standard | | DualSIM(nanoSIM, nanoSIM) |
| DualSIM mode | nd | dual standby |
| Hybrid DualSIM | nd | |
| Announced | 4Q 2023 | 3Q 2021 |
| Other names | M2314W1; Xiaomi Redmi Watch 4 | Xiaomi Redmi 9 Activ |
| GSM frequencies | | 850 900 1800 1900 |
| UMTS | | 850 900 1700 1900 |
| LTE standard | | FDD LTE: 2600, 2100, 1900, 1800, 1700, 900, 850, 800, 700 TDD LTE: 2600, 2500, 2300 |
| Standard 5G | | |
| CDMA | | |
| Standard TD-SCDMA | | |
| UMA | | |
CAMERAS - BACK
| First camera | | |
| Camera type | nd | Standard |
| Photo matrix | nd | 13 Mpx |
| Optical zoom | nd | |
| Field of view | nd | 75 ° |
| Flash | nd | LED |
| Dual-colour LED flash | nd | |
| Video resolution | nd | 1920x1080 px |
| Video formats | nd | H.264, MPEG4 - 30 fps |
| Additional | nd | AF, f/2.2 |
| Second camera | | |
| Camera type | nd | Depth of field |
| Photo matrix | nd | 2 Mpx |
| Optical zoom | nd | |
| Flash | nd | LED |
| Dual-colour LED flash | nd | |
| Video formats | nd | H.264, MPEG4 - 30 fps |
| Additional | nd | FF, f/2.4 |
CAMERAS - FRONT
| First camera | | |
| Camera type | nd | Portrait |
| Photo matrix | nd | 5 Mpx |
| Optical zoom | nd | |
| Flash | nd | |
| Dual-colour LED flash | nd | |
| Video formats | nd | H.264, MPEG4 - 30 fps |
| Additional | nd | FF |
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 | | 42.20 Mbit/s |
| HSUPA | | 5.76 Mbit/s |
| HSPA | | |
| HSPA+ | | |
| LTE DL | | - |
| LTE UP | | - |
| WIMAX+ | | |
| GPRS | | |
| EDGE | | |
| Bluetooth | v5.3 | |
| A2DP Profile | | |
| HDMI | | |
| WiFi | | v802.11 b/g/n |
| WiFi frequencies | | 2,4 GHz |
| WiFi Direct | | |
| WiFi Display | | |
| DLNA | | |
| Miracast | | |
| WiFi hotspot | | |
| IrDA | | |
| USB | | v2.0 |
| 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 |
| Hardware QWERTY keyboard | | |
| RSS Reader | | |
Multimedia
| Radio | | |
| MP3 | | |
| Stereo speakers | | |
| Audio Jack | | 3.5 mm |
| HD Voice | | |
| Sound formats | | AAC, AAC+, AMR, MID, WAV, eAAC+ |
| 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 | | |