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 Modulator Material: Plastic TV Standard Format: NTSC Frequency Range: CH3=61.25 / CH4=67.25 Output Impedance: 75OHm Output Level: 80±5dBμV Accompaniment System: M=4.5MHz Video Input Impedance: 75 Ohms/1k Ohms (Switch able) Input Impedance: 13±3k Ohms TV to Ant I Input Loss 50-860: -6±2dB A/V Connection: RCA Female RF Input: F Female RF Output: F Female Power Consumption: 5Volt DC, 500mah(min) Operating Temperature: 0℃ ~ +40℃ . Package List: 1 x RF Modulator 1 x Transmission Line1 x English Manual