To modulate Audio/Video/signal to RF signal over coaxial. With this product, user in the room can share and remote control their Digital Set Top Box, DVR, DVD. AV Receiver which are placed in the living room. This is made possible by converting the A/V Signal from the A/V equipment to RF signal and send to various rooms over RF circuits.Features:Using existing RF circuit in general homes.Sharing of STB, DVD with a few rooms.Flexibility in setting TV format such as PAL/NTSC and Sound IF to accommodate users from all part of the world.With the wide frequency range of 471.25MHz-885.25MHz, selectable transmitting frequency and correspondence frequency display and in built memory will minimize and avoid interference.The use of broadcast standard PCB circuit designed enhanced stability and better picture quality further.External setting for NTSC/PAL B/G,I,D/K,L.M/N TV formats for global use.Compatible with set top boxes and other A/V sources.UHF modulator - PAL/NTSC selectable.Output channel selectable.USB power supply.Specifications:RF Frequency Range: 471.25MHz-885.25MHzChannel Range: PAL: 21-69; NTSC: 14-83Default Factory Setting: Channel 21 (471.25MHz).PALRF Output Impedance: 75Ohm unbalancedVideo Input Impedance: 75OhmTV Format: PAL/NTSCSound Carrier Frequency: 4.5 / 5.5 / 6.0 / 6.5MHzPower: USB 5VDCPower Consumption: less than 1WMaterial: ABSItem Size: 104 * 68 * 24mm / 4.09 * 2.68 * 0.94in?Item Weight: 80g / 2.85ozPackage Weight: 122g / 4.30ozPackage Size: 13.2 * 10.5 * 3.2cm / 5.20 * 4.13 * 1.26inPackage List:1 * RF Modulator1 * USB Cable1 * Manual (English)