To convert audio/video signals to RF signals for transmission over coaxial cable. This device allows users to share and remotely control digital set-top boxes, DVRs, DVD players, and AV receivers located in one room (e.g., the living room) from other rooms. It achieves this by converting A/V signals from source equipment into RF signals and distributing them via existing RF wiring.Features: - Utilizes existing RF cabling in standard residential installations - Enables multi-room sharing of set-top boxes and DVD players - Supports flexible TV format settings, including PAL and NTSC, with adjustable sound IF frequencies for global compatibility - Wide frequency range: 471.25 MHz to 885.25 MHz; includes selectable transmit frequency, frequency display, and built-in memory to reduce interference - Broadcast-standard PCB design improves signal stability and picture quality - External switch supports multiple TV standards: NTSC/PAL B/G, I, D/K, L, M/N - Compatible with set-top boxes and other AV sources - UHF modulator with PAL/NTSC selection - Adjustable RF output channel selection - Powered via USB Specifications: - RF Frequency Range: 471.25 MHz – 885.25 MHz - Channel Range: PAL: Channels 21–69; NTSC: Channels 14–83 - Default Factory Setting: Channel 21 (471.25 MHz), PAL - RF Output Impedance: 75 Ohm unbalanced - Video Input Impedance: 75 Ohm - TV Format Support: PAL / NTSC - Sound Carrier Frequency Options: 4.5 / 5.5 / 6.0 / 6.5 MHz - Power Supply: USB 5V DC - Power Consumption: Less than 1W - Housing Material: ABS - Dimensions: 104 x 68 x 24 mm - Unit Weight: 80 g - Package Weight: 122 g - Package Dimensions: 13.2 x 10.5 x 3.2 cm Package Includes: 1 x RF Modulator 1 x USB Cable 1 x User Manual (English)