Usage Tips:SUPPORTS NTSC FORMAT OUTPUT: HD Multimedia Interface RF modulator supports NTSC format output, frequency range: CH3=61.25MHz CH4=67.25MHz. 1080P PLL CONTROL: 1080P PLL control VHF working frequency, HD Multimedia Interface input, RF input and output. FINE WORKMANSHIP: RF modulator is well made and suitable for your local CATV system. Supports HD Multimedia Interface 1.4 and HDCP 1.4. PLUG AND PLAY: HD Multimedia Interface to RF modulator requires no driver installation, portable, flexible, plug and play. RUGGED AND DURABLE: RF modulator is made of ABS material, durable and long life. Professionally made for stable performance. Colour:Black Material:ABS Package Contents: 1x Modulator Only 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.