Features 1.[RF Transmission] AV modulator can use existing RF circuits in ordinary homes. Remote control signals and power can be transmitted via RF. With infrared return function, use after installation. 2.[Compatible Use] When the set top box, DVD, DVR is located in the living room, the TV link modulator can share the set top box and DVD with several rooms, while having the room remote control function, convenient and practical. 3.[Easy To Use] TV formats such as PAL, NTSC and sound IF can be flexibly set using TV link modulator to suit users from all over the world. Support external settings for NTSC, PAL, B G, I, D K, L M N TV formats used worldwide. 4.[Reduce Interference] Both VHF and UHFC formats can be used in the wide frequency range of 47MHZ?865MHZ. Selectable transmitting frequency and corresponding frequency display as well as built in memory will minimize and avoid interference. 5.[Stable And Premium Image] This AV to RF converter is designed with broadcast standard PCB circuitry, further enhancing stability and better image quality. Premium ABS material, rugged and durable. specificationItem Type: TV Link Modulator Material: ABS RF Frequency Range: 471.25MHz-885.25MHz Channel Range: PAL: 21-69ch; NTSC: 14-83ch Factory Setting: Channel 21 (471.25MHz).PALI, 38KHz RF Impedance: 75 Sound Impedance: 75 TV Format: PAL, NTSC Sound Carrier Frequency: 4.5/5.5/6.0/6.5MHz Remote Control Distance 10m/32.8ft Communication Distance 30cm/1.0ft PackageList1 xTV Link Modulator 1 x USB Cable 1 x External IR Antenna 1 x Instruction Manual 2 x Double Sided Sticker NoteWhen setting up 2 or more receiving hosts, the RF splitter used must be oriented to avoid using splitters with isolation capacitors to maximize the best image quality, please connect a 2X4 TV link amplifier.