This 2-output kit includes: - A mast preamplifier for variable amplification (20-38 dB max.) + LTE filter. - A 12 V 2-output supply for 2 TNT receivers or 2 TVs with integrated receiver. Ideal in case of difficult reception, it allows you to increase the quality of your terrestrial signal to obtain several channels and/or improve the quality of the channels. Technical characteristics of the preamplifier: Model: HD-P-AMP-UHF. Input: UHF. Frequencies: 470-790 MHz. Gain: 15-38 dB. Maximum output: 102 dBµV. Noise factor: 3 dB. Power supply: 12 V DC, 50 mA. Connection: F Size: 105 x 103.5 x 50.5 mm. Weight: 245 g. Technical characteristics of the 2-output power supply: Model: HD-12A. Frequencies: 47-862 MHz. Gain: 2-8 dB. Connection: F Maximum output: 100 dBµV. Power supply: AC 220 V/50 MHz/DC 12 V/100 mA (max.).