| Model | A4 |
| System structure | Embedded RTOS,dual-core 32bit DSP(Hi3518EV201),pure hard compression ,watch dog |
| Sensor | 1.0M 1/4" SC2145HCMOS sensor ,color 0.1Lux@F1.2,black/white 0.01Lux@F1.2 |
| Video compression | H.264+/H.264,support dual stream,AVI;0.1M~6Mpbs variable;1~30f/s variable |
| Image output | Main stream: 1280*720@25fps;sub-stream: 704*576@25fps; |
| Shutter | 1/50(1/60)s to 1/10,000s |
| Lens | N/A |
| Day and night | Support IR-CUT |
| Noise reduction | Support 2D/3D |
| Wide dynamic | Support digital |
| Auto iris | N/A |
| Audio compression | G.711,support bidrectional talk,audio&video synchronization |
| Audio interface | 1ch input,level:2Vp-p,impedance:1kΩ,support sound pick-up input;1choutput,impedance:16Ω,30mw,support microphone |
| Network interface | N/A |
| Extension interface | N/A |
| Singal interface | One photo resistance interface,one IR-CUT interface ,support photo resistance signal and IR-CUT links to IR |
| Human induction | PIR infrared sensor about the human body，Passive induction |
| Motor interface | N/A |
| Alarm I/O | N/A |
| WIFI interface | Supports Wi-Fi, a key WPS function |
| Reset interface | Support a key reset function |
| SD Card | Supports |
| Reliability | Comprehensive lightning protection, 7 * 24 hours 65 ℃high temperature stable and reliable testing |
| Intelligence analysis | N/A |
| Other function | Support WEB,OSD,live video transmission,motion detect and IO alarm,front-end storage/playback/download, and center reminder and image linkage,support JPEG capture；united remote client monitoring sofaware、MYEYE;perfect SDK; |
| ONVIF | N/A |
| Mobile monitoring | Support multiple mobile monitoring（iOS，Android） |
| Power | Three kinds of power supply option:1-DC5V 2-AC24V3-2*18650 Battery |
| Dimension | Low Power Doorbell |
| Other | not support any custom |