To modulate Audio/Video/signal to RF signal over coaxial. With this product, users in the room can share and remotely control their Digital Set Top Box, DVR, DVD, or AV Receiver located in the living room. This is made possible by converting the A/V signal from the A/V equipment to RF signal and transmitting it to various rooms over existing RF circuits.Features: - Utilizes existing RF circuitry commonly found in homes - Enables sharing of STB, DVD, and other A/V sources across multiple rooms - Supports selectable TV formats including PAL/NTSC and Sound IF for global compatibility - Wide frequency range from 471.25MHz to 885.25MHz with selectable transmission frequency and on-screen frequency display; built-in memory helps minimize interference - Broadcast-standard PCB design ensures enhanced stability and improved picture quality - External selection support for NTSC/PAL B/G, I, D/K, L, M/N TV formats for worldwide use - Compatible with set-top boxes and other standard A/V sources - UHF modulator with PAL/NTSC format selection - Selectable output channel - Powered via USBSpecifications: - RF Frequency Range: 471.25MHz – 885.25MHz - Channel Range: PAL: 21–69; NTSC: 14–83 - Default Factory Setting: Channel 21 (471.25MHz), PAL - RF Output Impedance: 75 Ohm unbalanced - Video Input Impedance: 75 Ohm - TV Format: PAL/NTSC - Sound Carrier Frequency: 4.5 / 5.5 / 6.0 / 6.5 MHz - Power Supply: USB 5V DC - Power Consumption: Less than 1W - Material: ABS - Item Size: 104 x 68 x 24mm / 4.09 x 2.68 x 0.94in - Item Weight: 80g / 2.85oz - Package Weight: 122g / 4.30oz - Package Size: 13.2 x 10.5 x 3.2cm / 5.20 x 4.13 x 1.26in Package List: - 1 x RF Modulator - 1 x USB Cable - 1 x User Manual (English)