WB100HD is a smart WiFi box that is perfect compatible with models 3499F/FB and 3599F/FB, desegned for inspection of sewer, pipe, air ducts, underground cable pipes, etc. It features a bild-in WiFi hotspot, supporting real-time viewing, dual-screen viewing, recording with sound, and simultaneous connetion to multiple smart devices, allowing easy sharing of captured image and videos. Even if the build-in screen is damaged, you can still se the live view via your smart device.