In addition to security systems, our company also provide other extra low voltage (ELV) systems such as: public address system, nurse call & emergency call, communal aerial broadcast distribution (CABD) system, etc. 除了保安系統外，本公司還提供設計及安裝其他超弱電系統，包括：公共廣播系統、謢理員呼喚及緊急呼喚、公共天線等等。