Features1.[PERFECT FIT] UHF modulator, PAL/NTSC optional, applicable for your own local CATV system. 2.[BROAD COMPATIBILITY] TV link modulator compatible with set top box and other A/V sources, more reliable to use. 3.[PRACTICAL] The AV to RF converter designed with adjustable output level, and optional output channel. 4.[SIMPLE DESIGN] The RF TV micro modulator has simple appearance design, exquisite workmanship, making you fondle admiringly. 5.[PREMIUM MATERIAL] The RF modulator adopts high quality plastic material, sturdy and durable, and you can use for a long time.SpecificationItem Type: TV Link ModulatorMaterial: PlasticTV Standard Format: PAL /NTSCChannel Range: PAL: 471.25~865MHz21~69ch NTSC: 471.25~885MHz(14~83ch)Output Level: 855dBuVAccompaniment System: M=4.5MHz, B/G=5.5MHz, I=6.0MHz, D/K=6.5MHzA/V Connection: RCA FemaleRF Input: F femaleRF Output: F femaleRF Output Impedance: 75 (Unbalanced)Video Input Impedance: 75 Default Factory Setting: Channel 21(471.25MHz), PALEnergy: USB DC 5VPower Consumption: