This item is combined with RF anti-inference circuit and tone key squelch circuit to avoid any interference and noise. It was installed with IR transmitter sync LED device also.是什么意思_This item is combined with RF anti-inference circuit and tone key squelch circuit to avoid any interference and noise. It was installed with IR transmitter sync LED device also.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句