Commūnicātiō per radiophōnum longī āmissūs dicitur trānsmīssiō vocis aut dātōrum per lōngās distāntiās per undās radiōnīcās, adiūvantibus instrumentīs ut radiophōna bidirectiōnalia, quae fabricat Quanzhou Kaili Electronics Co., Ltd. Huiusmodī commūnicātiō nititur transmitteribus altīus potentiae, antennaēbus perītīs, et optimīs fāmiliīs frequentiae (VHF pro locīs apērtīs, UHF pro terrīs mixtīs) ut consequantur 5–50 chiliōmetra aut amplius, prout conditiōnēs dīcunt. Commūnicātiō per radiophōnum longī āmissūs est necessāria in cāsibus ubi commūnicātiō cellulāris aut satellitāris aut nōn adest aut nōn convenit—ut in missiōnibus salūtāriīs remotīs, operātiōnibus mīlitāribus, lōgistīcā rurāli, aut in locīs industriālibus magnīs. Instrumenta quae hanc rem faciunt fabricantur in fābricā stāndārdī 12 000 metrōrum quadrātōrum cum līneīs productīvīs recentissimīs et instrumentīs testandī importātīs, ut stabilitās signī et durābilitās stāndardibus strictīs satisfaciātur. Artēs perītīae includunt modulātiōnem frequentiae (FM) ad clāritātem, cryptōgraphiam ad sēcūritātem, et algorīthmōs correctiōnis errōrum ut interpositiōnem minuant. Systemata commūnicātiōnis radiophōnicārum longī āmissūs saepe includunt repetītōrēs ut tēgantur locī difficilēs. Haec systemata iuvant coordinātiōnem rēī publicae, responsa ad ēmergēntiās, et ūtilitātem operātiōnum per āmphēs terrās, ita ut in locīs prōfessiōnālibus et in campō sint necessāria. Quanzhou Kaili Electronics, quae sibi proponit „victōriam per qualitātem“, sēcūra efficit ut instrumenta eōrum praestent in commūnicātiōne radiophōnicā longī āmissūs, fidam connexiōnem offerente, ubi maxime opus est.