| Hardware and OS | Douzo Knight D51 | |
| Operating System | Android v7 (Nougat) | |
| Processor | 1.3 GHz, Quad Core Processor | |
| RAM | 1 GB | |
| Internal Memory | 8 GB | |
| Memory Card Slot | Yes, upto 64 GB | |
| Dual Sim | Yes | |
| Sim Size | Nano Nano SIM | |
| Sim Type | Dual Sim, GSM GSM | |
| Display | Douzo Knight D51 | other phones |
| Screen Size | 5 inches, 1920 x 1080 pixels | |
| Display Type | Color LCD screen | |
| Pixel Density | ~441 PPI | |
| Touch Screen | Yes, with Multitouch | |
| Display aspect ratio | 16:9 | |
| Connectivity | Douzo Knight D51 | other phones |
| 3G Network | Yes | |
| 4G Network | Yes | |
| Bluetooth | Yes | |
| EDGE | Yes | |
| GPRS | Yes | |
| GPS | Yes | |
| USB | Yes, microUSB | |
| USB Features | USB Charging | |
| VoLTE | Yes | |
| Wifi | Yes, with wifi-hotspot | |
| Camera | Douzo Knight D51 | other phones |
| Main camera | 5 MP | |
| Video Recording | 1080p @ 30fps FHD | |
| Selfie camera | 0.3 MP | |
| Multimedia | Douzo Knight D51 | other phones |
| Headphone jack | Yes | |
| Email | Yes | |
| FM Radio | Yes | |
| Music | Yes | |
| Video | Yes | |
| Browser | Yes, supports HTML5 | |
| Java | No | |
| Battery | Douzo Knight D51 | other phones |
| Battery capacity | 2200 mAh | |
| Type | Non-Removable Battery | |
