AV transmitter Dahua Technology DH-PFM881

The DAHUA AV transmitter DH-PFM881 is a wireless audio-video link designed for long-range transmission up to 3000 m. The compact unit accepts 24 V power with a 0.5 A current rating and provides encrypted wireless transport for AV signals. Small dimensions (30 mm × 80 mm × 280 mm) allow flexible placement in equipment cabinets, rack mounts or near cameras and monitors where space is limited.

Advantages

The DH-PFM881 offers long-range wireless transmission combined with support for multiple industry-standard security algorithms including AES, TKIP, WEP, WPA-PSK and WPA2 to protect data in transit. Its low power consumption and compact size facilitate integration into existing surveillance or AV installations. The transmitter's design focuses on reliable link stability for remote camera feeds or AV distribution without the need for extensive cabling.

Suitable for

• Extending video and audio signals to remote surveillance cameras and monitoring stations
• Temporary event AV distribution where cabling is impractical
• Remote locations and outdoor installations requiring wireless links up to several kilometers
• Integration into security systems that require encrypted wireless transmission

Key specifications

• Maximum wireless transfer distance: up to 3000 m
• Operating voltage: 24 V
• Current consumption: 0.5 A
• Supported security algorithms: AES, TKIP, WEP, WPA-PSK, WPA2
• Physical dimensions (W × D × H): 30 mm × 80 mm × 280 mm

How to use

Install the DH-PFM881 in a dry, ventilated location close to the source or display device, ensuring antenna orientation and line of sight are optimized for maximum range. Connect the unit to a 24 V power supply rated for at least 0.5 A and attach AV input or output connections according to the system layout. Configure wireless settings and select the appropriate security algorithm to match the receiving device and network policy. Perform link testing at the intended installation distance and adjust placement if necessary to achieve stable signal quality.

Usage recommendations

For best performance, mount the transmitter with clear line of sight to the receiver and avoid sources of strong radio interference. Use the strongest supported security algorithm available in both transmitter and receiver to maintain encrypted transmission. Verify power supply compatibility and secure all connectors to prevent accidental disconnection in outdoor or high-traffic environments.