To convert audio/video signals to RF signals for transmission over coaxial cable. This device allows users to distribute and control digital set-top boxes, DVRs, DVD players, and AV receivers from remote locations within the home. It achieves this by converting A/V signals into RF signals and distributing them through existing RF wiring.Features: - Works with standard home RF cabling - Supports distribution of set-top boxes and DVD players to multiple rooms - Adjustable TV system settings (PAL/NTSC) and sound IF options for global compatibility - Frequency range: 471.25 MHz to 885.25 MHz; includes selectable transmit frequency, frequency display, and built-in memory to reduce interference - PCB design compliant with broadcast standards for improved signal stability and video quality - External switchable support for PAL/NTSC TV systems (B/G, I, D/K, L, M/N) - Compatible with common AV sources including set-top boxes - UHF modulator with PAL/NTSC selection - Selectable RF output channel - 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 System: PAL/NTSC - Sound Carrier Frequency: 4.5 / 5.5 / 6.0 / 6.5 MHz - Power Supply: USB 5V DC - Power Consumption: < 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)