Thông số kỹ thuật
| Model | DS-KH2220 |
| Display screen | 7-Inch Colorful TFT LCD |
| Display resolution | 800 × 480 |
| Operation method | Physical Button |
| Audio input | Built-in Omnidirectional Microphone |
| Audio output | Built-in Loudspeaker |
| Audio quality | Noise Suppression and Echo Cancellation |
| Four-wire interface | 1-ch Video Input, 1-ch Audio Input/Output, 1-ch Power Supply, 1-ch Grounding |
| Power supply | 12 VDC |
| Power consumption | ≤5 W |
| Working temperature | -10°C to + 55°C |
| Working humidity | 10% to 90% |
| Dimension (LxWxH) | 195.8 × 132.8 × 18.39 mm |

