Features: Using existing RF circuit in general homes. Remote control signal and power can be transmitted via RF. Share 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. Flexibilities in setting TV format such as PAL/NTSC and Sound IF to accommodate users from all part of the world. With the wide frequency range of 471.25MHz ~885.25MHz, 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. Specifications: Material: ABS RF Frequency Range: 471.25MHz~855.25MHz Channel Range: 21~69 Default Factory Setting: Channel 21 (471.25MHz). PAL I, 38KHz RF Output Impedance: 75 unbalanced Video Input Impedance: 75 TV Format: PAL/NTSC Sound Carrier Frequency: 4.5/5.5/6.0/6.5MHz Remote Distance: ≥10m Transmitter Distance: ≤30cm Remote Control Frequency: 38/56KHz Power: USB 5V Power Consumption: ≤500mW Item Size: 117 * 57 * 24mm / 4.61 * 2.24 * 0.94in Item Weight: 107g / 3.79oz Package Weight: 124g / 4.38oz Package Size: 12 * 9.5 * 2.5cm / 4.72 * 3.74 * 0.98in Packing List: 1 * Modulator 1 * USB Cable 1 * IR Emitter Cable 1 * Manual (English)