1、[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. 1 x TV Link Modulator1 x Transmission Cable1 x English Manual Item Type: TV Link ModulatorMaterial: PlasticTV Standard Format: PAL /NTSCChannel Range: PAL: 471.25~865MHz（21~69ch）                            NTSC: 471.25~885MHz(14~83ch)Output Level: 85±5dBuVAccompaniment 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 Ω (Unbalanced)Video Input Impedance: 75 ΩDefault Factory Setting: Channel 21( 471.25MHz), PALEnergy: USB DC 5VPower Consumption: <1WOperating Temperature: 0℃ ~ +40℃