VTO6521H is an outdoor IP video intercom produced by Dahua. It has an integrated speaker and processor, so it can operate in Full Duplex mode, allowing communication in both directions simultaneously. It features a 4.3 inch IPS screen with a resolution of 800 x 480 pixels. The video camera has a resolution of 2 MP, with a 1/2.7 inch HD CMOS sensor. The 2.8 mm fixed lens offers a wide viewing angle: 113.79 horizontally, 61.5 vertically and 134.45 diagonally.
Technical specifications Dahua VTO6521H video intercom:
- Processor: built-in
- Operating system: Linux OS
- Button type: touch
- ROM: 4 GB
- RAM: 1 GB
- Screen: 4.3 inch, IPS
- Sensor: 1/2.7 inch CMOS
- Screen resolution: 800 x 480 pixels
- Viewing angle: horizontal 113.79, vertical 61.5, diagonal 134.45
- Fixed lens: 2.8 mm
- Aperture: F2.0
- Video compression: H.264
- WDR: 120 dB
- Noise reduction: 3D NR
- Video resolution: 2 MP (1920 x 1080 pixels) HD
- Motion detection: Yes
- Card reading distance: 1-5 cm
- Local issuing card: Yes
- Number of cards: max. 10,000
- Ports: 1 x RS-485; 2 x alarm input; 2 x alarm output; 1 x EXIT Button; 1 x Door status detection; 1x RJ45 10Mbps/100 Mbps (auto-adaptive);
- Power supply: DC 12V/2 A
- Installation: surface/recessed
- Protection degree: IP65
- Dimensions: 389 x 145 x 41.9 mm
- Casing: PC + ABS
- Operating temperature: -30C – +60C
- Weight: 1.4 Kg
VTO6521H is ideal for apartment buildings, with several unlocking methods: IC card, PIN code or remotely via the DMSS/gDMSS mobile applications (for Android) and iDMSS (for iOS). It can also be configured via the web and allows voice calls. The card reading distance is between 1 and 5 cm, and it can store up to 10,000 cards.
The call button is touch-sensitive, and the 10/100 Mbps RJ45 port (auto-adaptive) allows connection to the network. The video intercom has an anti-tamper alarm, noise reduction function and motion detection. The camera includes white light and infrared (IR) illumination for clear images even in low light conditions. It also supports SIP server and can manage up to 200 indoor stations, making it suitable for hotels or large buildings.
VTO6521H can be connected to IP cameras and switches, which allows the creation of a secure and efficient access control system. It is IP65 certified, which means it is resistant to water and dust. The power supply is 12V DC/2A, and the operating temperature range is between -30C and +60C.




