A4Tech PK-940HA FHD 1080P AF Webcam Earphone they can extend the distance

they can extend the distance to several kilometers even tens of kilometers which can basically satisfy the distance requirement of LAN

Classic Black with Shine-resistant PBT material

JBL Horizon 2 Bluetooth Clock Radio Speaker with FM Radio and DAB

Video and audio output through HDMI port with resolution up to 3840 x 2160 at 30Hz

Hikvision 8 Port Gigabit Unmanaged POE Switch DS-3E0510P-E with Layer 2 network switch designed for video data transmission

A4Tech PK-940HA FHD 1080P AF Webcam Earphone they can extend the distanceA4Tech PK 940HA FHD 1080P AF Webcam Compatible with 1080p (FULL HD) and 720p (HD) video calling at 30fps in clear, sharp image quality on your favorite applications such as Skype, etc, The quick and rapid auto focus ensures the camera to stay focused on your face automatically without distortion, Ultra wide 75 angle lens. Great for video chats and video conferences.