Good Performance: HDM69L modulator, support VHF or UHF dual working frequency, plug voltage 90?240V, stable connection, with good working performance. Adjustable: This HD Multimedia Interface modulator can adjust the AV output level, 1080P, 1080i, 720P, 576P, 576i, 480p multi resolution support, accurate analysis, more flexible to use. Easy To Use: HD AV to RF modulator, optional output channel, HD Multimedia Interface and AV input, support PAL or NTSC TV format output, to meet your different needs. Portable: Humanized design, small and light, easy to carry, made of high quality ABS and metal materials, wear and , and can be used for a long time. Drive : This high definition modulator does not need to install a driver, simple , plug and play, professional manufacturing, convenient and fast installation.