Avtex STH4000 Active Antenna High Gain Digital Freeview TV Aerial Booster 12/24v
It is light weight, compact and very easy to use. Alternatively, the STH4000 uses a 12/24 volt dc power inserter (included) perfect for caravanners and truckers alike! Avtex STH4000 Active Antenna. High gain 20dB TV aerial.