Features: The RF modulator is fit for your own local CATV system.VHF working frequency for PLL controlled, HD input, A/V output, RF output.Selectable output channels.The RF coaxial converter supports NTSC TV format output, no need to install driver program, portable, flexible, plug and play.The VHF demodulator converter has personalised design, exquisite workmanship, making you fondle admiringly.The RF modulator is made of high quality plastic material, sturdy, durable and long service life. Professional manufacturing, stable characteristics and high reliability.Specifications: Model: M61AStandard: NTSCFrequency Range: CH3=61.25MHz / CH4=67.25MHzOutput Impedance: 75 OHmOutput Level: 805dBVSound System: M=4.5MHzVideo Input Impedance: 75 Ohms/1k Ohms (Switch )Audio Input Impedance: 133k OhmsTV to ANT Insertion Loss 50-860: -62dBA/V Connector: RCA femaleRF Input: F femaleRF Output: F femalePower Consumption: USB 5V DCOperating Temperature: 0 ~ +40Material: plasticcolour: BlackPackage Contents: 1 x RF Modulator1 x USB Cable1 x English instructionsOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.