One For All SV9425 Amplified Indoor Aerial 44dB with Automatic Gain Control Flat, standing or wall mounted it will blend into any interior. Capable of receiving all your favorite channels in 4K Ultra HD, whether it is television (DVB-T/T2) or radio (DAB+). The unique Automatic Gain Control ensures optimal gain at all times. Plug it in and start watching immediately.The required level of gain changes from time to time. Automatic Gain Control ensures the correct gain level at all times.Minimal interference thanks to the active noise reduction filters. Including 4G GSM block filter for crystal clear reception. Features: Automatic Gain Control 4K Ultra HD Multi-position 4G LTE filter