пищалка вот примерно такая на 5 в +%D1%88%D1%83%D0%BC%D0%B0+433.92&safe=off&espv=2&biw=1600&bih=799&source=lnms&tbm=isch&sa=X&ei=WxHWVJP2FcrpaI7dguAP&ved=0CAYQ_AUoAQ#safe=off&tbm=isch&q=%D0%BF%D1%8C%D0%B5%D0%B7%D0%BE+%D0%BF%D0%B8%D1%89%D0%B0%D0%BB%D0%BA%D0%B0&imgdii=_&imgrc=v5sT8PDrCglXiM%253A%3B7YCeDAfU5kKTGM%3B
приемник 433 МГц вот такой +%D1%88%D1%83%D0%BC%D0%B0+433.92&safe=off&espv=2&biw=1600&bih=799&source=lnms&tbm=isch&sa=X&ei=WxHWVJP2FcrpaI7dguAP&ved=0CAYQ_AUoAQ#safe=off&tbm=isch&q=%D0%BF%D1%80%D0%B8%D0%B5%D0%BC%D0%BD%D0%B8%D0%BA+433+%D0%BC%D0%BE%D0%B4%D1%83%D0%BB%D1%8C+%D0%B2+%D1%81%D0%B8%D0%B3%D0%BD%D0%B0%D0%BB%D0%B8%D0%B7%D0%B0%D1%86%D0%B8%D0%B8&imgdii=_&imgrc=D9i77RE5doTSiM%253A%3BtW4DmD9j_Zh1DM%3B