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, 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 sending it to various rooms over RF circuits.Features: - Uses existing RF circuit in standard homes - Enables sharing of STB, DVD with multiple rooms - Supports TV formats such as PAL/NTSC and Sound IF for global compatibility - Wide frequency range: 471.25MHz885.25MHz with selectable transmitting frequency, frequency display, and built-in memory to minimize interference - Broadcast-standard PCB circuit design ensures enhanced stability and improved picture quality - External selection for NTSC/PAL B/G, I, D/K, L, M/N TV formats for worldwide use - Compatible with set top boxes and other A/V sources - UHF modulator with PAL/NTSC selection - Output channel selection available - Powered via USBSpecifications: - RF Frequency Range: 471.25MHz885.25MHz - Channel Range: PAL: 2169; NTSC: 1483 - 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 Manual (English)