Features: Multiple support source:for Set Top Boxes and other A/V sources. Meet all of your needs:Cost effective for your own local CATV system. Thoughtful design:Designed with adjustable audio/video output level, and optional output channel. Excellent selected material:Adopt high quality material, sturdy and durable, and you can use for a long for time. Your best choice for buying modulator:Simple appearance design, exquisite workmanship, making you fondle admiringly. Specifications: Material:Plastic Size:Approx.11.8x9.6x2.5cm/4.64x3.77x0.98in Color:Black Channel Range:UHF 21~69 Output level:855dBuV Sound system:M=4.5MHzB/G=5.5MHzI=6.0MHzD/K=6.5MHz A/V connector:RCA female Power Consumption:USB5V@400mA Operating Temperature:0 ~ +40 Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package includes: 1 x Modulator 1 x USB Cable 1 x Signal Receiving Cable 1 x User Manual