4 In 1 VTR Remote Control Multiple Devices Simultaneously Controlling Usage

55 Keys Universal 4 in 1 VTR Remote Control for Chile Market in South America. Description: - One remote control device to control multiple devices simultaneously. By the infrared emission circuit, infrared receiver, amplifying, demodulators, amplifiers, receiving an indication, delay, electronic switches, counters, channel display, the channel preselector, channel converter, and a composite video signal converter power supply. - And open a button control channel conversion