Ideal for difficult reception: Improves terrestrial signal quality to receive more channels and enhance their quality. Mast preamplifier: Model: HD-P-AMP-UHF. Frequencies: 470-790 MHz. Gain: 15-38 dB, LTE filter included. Max output: 102 dBµV, noise figure: 3 dB. Power supply: 12 V DC, 50 mA. Connection: F, compact size (105 x 103.5 x 50.5 mm), weight: 245 g. Power supply 2 outputs: Model: HD-12A. Frequencies: 47-862 MHz. Gain: 2-8 dB, max output: 100 dBµV. Power supply: AC 220 V/50 Hz/DC 12 V/100 mA (max). Connection: F, to connect 2 TVs or DTT receivers. Includes: Preamplifier, power supply, and installation manual. Perfect for optimizing signal in complex reception environments.