Aligator R40 eXtremo vs Aligator K50 eXtremo
| Type | Bar (classic) | Bar (classic) |
| Waterproofness & dust-resistance | IP68 | IP68 |
| Dimensions | 129.50 x 62.00 x 15.50 mm | 132.50 x 60.50 x 21.00 mm |
| Weight | 150.00 g | 226.00 g |
| Display size | 2.40" | 2.40" |
| Display | Color / TFT 256k colors 240 x 320 px (2.40") 167 ppi | Color / TFT 256k colors 240 x 320 px (2.40") 167 ppi |
| Display protection |   | |
| Additional display | | |
| Protection of the secondary display | | |
| Talk time (max.) | 2G: 600 min. (10.0 h) |  |
| Stand-by (max.) | 2G: 336 h. (14.0 days) | |
| Standard battery | Li-Ion 2000 mAhBuy powerbank
| Li-Ion 2500 mAhBuy powerbank
|
| Quick battery charging | | |
| Wireless battery charging | | |
| Phonebook memory | 500 places | |
| Internal memory | 4 GB | 4 GB |
| End-user memory | 2 GB | 2 GB |
| RAM memory | 512 MB | 512 MB |
| Memory cards |  microSD, microSDHC, microSDXC up to 256 GBBuy memory card | microSD, microSDHC, microSDXC up to 512 GBBuy memory card |
| Operating system | - | KaiOS |
| Processor | - | MediaTek MT6731 |
| Processor clock | - | 1100 MHz |
| GPU | - | PowerVR GE8100 |
| Touchscreen | | |
| DualSIM | | |
| SIM cards standard | DualSIM(miniSIM, miniSIM) | DualSIM(miniSIM, microSIM) |
| DualSIM mode | dual standby | dual standby |
| Hybrid DualSIM | | |
| Other names | - | - |
| GSM frequencies | 850 900 1800 1900 | 850 900 1800 1900 |
| UMTS | | 900 2100 |
| LTE standard | | FDD LTE: 2600, 2100, 1800, 800 |
| Standard 5G | | |
| CDMA | | |
| Standard TD-SCDMA | | |
| UMA | | |
CAMERAS - BACK
| First camera | | |
| Camera type | Standard | Standard |
| Photo matrix | 3.2 Mpx | 5 Mpx |
| Optical zoom | | |
| Flash | LED | |
| Dual-colour LED flash | | |
| Additional | FF | FF |
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 | v2.0 |
| HSCSD | | |
| HSDPA | | 42.20 Mbit/s |
| HSUPA | | 5.76 Mbit/s |
| HSPA | | |
| HSPA+ | | |
| LTE DL | | - |
| LTE UP | | 51.00 Mbit/s |
| WIMAX+ | | |
| GPRS | | |
| EDGE | | |
| Bluetooth | v4.0 | v4.0 |
| A2DP Profile | | |
| HDMI | | |
| WiFi | | v802.11 b/g/n |
| WiFi frequencies | | 2,4 GHz |
| WiFi Direct | | |
| WiFi Display | | |
| DLNA | | |
| Miracast | | |
| WiFi hotspot | | |
| IrDA | | |
| USB | | |
| GPS | | |
| A-GPS | | |
| GLONASS | | |
| Beidou | | |
| Galileo | | |
| QZSS | | |
| NFC | | |
COMMUNICATION AND MESSAGING
| Call waiting | | |
| Call forwarding | | |
| Push To Talk | | |
| SMS | 200 places | |
| EMS | | |
| MMS | | |
| Swype | | |
| Hardware QWERTY keyboard | | |
| RSS Reader | | |
Multimedia
| Radio | | |
| MP3 | | |
| Stereo speakers | | |
| Audio Jack | 3.5 mm | 3.5 mm |
| HD Voice | | |
| Polyphony | | |
| Video ringtone | | |
| Ring composer | | |
| Games | | |
| Java | | |
| 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 | | |
| Vibrations | | |