DOORBELL-4-B
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                DOORBELL-4-B
                        specifications and features
                    General information
| Number of homes | 1 | 
| Compatibility | Hub 2 (2G / 4G) / Hub 2 Plus / Hub BP / Hub Hybrid (2G / 4G) / Rex 2 / NVR (8ch / 16ch) | 
Power consumption
| Power mode | DC / AC | 
| Voltage | 12V ~ 24V / 16V ~ 24V | 
| Built in battery | Yes | 
| Battery model | Li-ion 600mAh | 
Ambient
| Operating temperature | -25 ºC ~ 60 ºC | 
| Degree of protection | IP54 | 
| Use | Indoor-outdoor | 
| Maximum humidity | 90% | 
Material and dimensions
| Installation height | 1.2 m ~ 1.5 m | 
| Dimensions | 145 x 47 x 34 mm | 
| Net weight | 165 g | 
| Weight with packaging | 300 m | 
| Color | Black | 
| Support included | Yes, 3 | 
AUDIO (VIDEO INTERCOM)
| Sound input | Omni-directional microphone | 
| Sound output | Built-in speaker | 
| Bidirectional audio | Sí | 
GENERAL CHARACTERISTICS (VIDEO INTERCOM)
| Tamper | Sí | 
| PIR detection | Yes, up to 4 m | 
CAMERA
| Resolution | 4 Mpx | 
| Sensor | CMOS | 
| Horizontal viewing angle | 155º | 
| Night vision | Sí, hasta 6 m | 
| Day / Night | IR | 
| Video compression | H.264 | 
| Motion detection | Yes | 
| Classification Human / vehicle / pet | Yes | 
OPENING
| Call elements | Simple button | 
NETWORK CHARACTERISTICS (INTERCOM MONITORS)
| Network protocol | Jeweller / Wings | 
| Wi-Fi | Sí | 
| Tipo de Wi-Fi | 2.4 GHz | 
| ONVIF | Yes | 
| Frequency | 868.0 MHz ~ 868.6 MHz | 
| Transmission distance | Up to 1700 m | 
