Feature:1. [PRACTICAL] The RF modulator is fit for your own local CATV system. You will get more benefits and convenience while saving a lot on it.2. [STABLE PERFORMANCE] VHF working frequency for PLL controlled, HD input, A/V output, RF output. Selectable output channels.3. [CONVENIENT TO USE] The RF coaxial converter supports NTSC TV format output, no need to install driver program, portable, flexible, plug and play.4. [COMPACT APPEARANCE] The VHF demodulator converter has personalised design, exquisite workmanship, making you fondle admiringly.5. [PREMIUM MATERIAL] The RF modulator is made of high quality plastic material, sturdy, durable and long service life. Professional manufacturing, stable characteristics and high reliability.Specification:Item Type: RF ModulatorMaterial: PlasticTV Standard Format: NTSCFrequency Range: CH3=61.25 / CH4=67.25Output Impedance: 75OHmOutput Level: 805dBVAccompaniment System: M=4.5MHzVideo Input Impedance: 75 Ohms/1k Ohms (Switch able)Input Impedance: 133k OhmsTV to Ant I Input Loss 50-860: -62dBA/V Connection: RCA FemaleRF Input: F FemaleRF Output: F FemalePower Consumption: 5Volt DC, 500mah(min)Operating Temperature: 0 ~ +40.Package List:1 x RF Modulator 1 x Transmission Line1 x English Manual