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. Remote control signal and power can be transmitted via RF. Sharing of STB, DVD with a few rooms. At the same time having the function of remote control in the rooms when the STB, DVD, DVR are positioned in the living room. Flexibility in setting TV format such as PAL/NTSC and Sound IF to accommodate users from all part of the world. With wide frequency range, both formats of VHF and UHF can be used. 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. Cost effective for your own local CATV system. Compatible with Set Top Boxes and other A/V sources. UHF Modulator - PAL/NTSC Selectable. Output Channel Selectable. RF Outputs for use with SLX and TV-Links. Specifications: RF Frequency Range: 471.25MHz-885.25MHz Channel Range: PAL: 21-69ch; NTSC: 14-83ch Default Factory Setting: Channel 21 (471.25MHz).PAL I, 38KHz RF Output Impedance: 75Ohm unbalanced Video Input Impedance: 75Ohm TV Format: PAL/NTSC Sound Carrier Frequency: 4.5 / 5.5 / 6.0 / 6.5MHz Remote Distance: more than 10m Transmitter Distance: less than 30cm Remote Control Frequency: 38/56KHz Power: USB 5VDC Power Consumption: less than 1W Material: ABS Item Size: 104 * 68 * 24mm / 4.09 * 2.68 * 0.94in? Item Weight: 96g / 3.39oz Package Weight: 137g / 4.85oz Package Size: 13.2 * 10.5 * 3.2cm / 5.20 * 4.13 * 1.26in Package List: 1 * TVLINK Modulator 1 * USB Cable 1 * IR Emitter Cable 1 * Manual (English)