V21 Digital Network Map Transmission With multi-function all-in-one map transmission, integrated dual SBUS, 1-way serial data, 1-way network port, support for one-to-many networking, 800MH, 1.4G, 2.4G three-frequency free switching, to adapt to the needs of different working conditions.LAN serial port are transparent transmission, the user can be used for all to replace the limited transmission needs. Built-in web configuration page, easy to use. Click for more product information