This RF modulator allows you to convert AV inputs to RF output signals, and when you turn on the system, the AV will automatically switch to home TV. This modulator provides a clearer picture and is free from external signal interference. Suitable for satellite receivers, video cameras, video game consoles, CCD cameras, VCRs, DVDs and more. Features: Support VHF/UHF operating frequency. Digital channel display. Ergonomic shape, easy to install, easy to operate. Adjustable output level and adjustable audio/video output level. Digital channel display and selectable output channel. Compatible with all local CATV systems. Technical data: Kolor blue Plug type: EU 230 V Material: plastic Standard: pal / NTSC Frequency Range: 47-868MHz Output Impedance: 75 ohms Output level: 70-90 dBuV Input level: 0,77 Vp-p for 80% +/-10% modulation. Sound system: M=4,5 MHz, B/G=5,5 MHz, I=6,0 MHz, D/K=6,5 MHz Insertion loss: <1,5dB Working Temperature: 10 ℃ ~ + 60 ℃ Size: approx. 16*9.5* cm /6.3*3.7*2.0in Weight: approx. 416g List of packages: 1*modulator 1 * User Manual