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The call station keyboard is used in conjunction with the basic call station to broadcast human or pre-recorded broadcasts to any specified area, and to select the area or perform scheduled operations. The call station keyboard is equipped with 8 programmable buttons, each with a two-color LED status indicator. Basic function calling station keyboard keys can be specified for different operations, such as: ? control function: choose to call, call the activation, deselect, close the background music, the background music volume control and fault confirmation, select source: background music channel, pre - recorded information, tips and alarm sound, choose target: regional and regional group of users can according to different operating mode (for example, the transient and switch) was carried out on the key programming. Each button is equipped with a two-color LED status indicator light. Each LED indicator is flanked by a transparent, removable convex platform to hold key functions or area labels. In addition, users can also choose and buy protective cover to prevent accidental activation of the key. The keyboard is powered by the call station it connects to. Control and indicator, eight function keys, eight double color LED lights interconnected components, two of the serial data and power connections certificate and recognized safety in accordance with IEC 60065 / EN 60065 standard immunity in accordance with EN 55103 ? 2 / EN 50130 / EN 50121 ? ? 4 standard cooling conform to EN 55103-1/4 FCC - 47 standard part b 15 emergency conform to EN 60849 / EN/ISO 7240 ? ? 16 16 54 Standard sailing meets IEC 60945 regional certification European CPR EU_CPR CE COC CE CertAlarm CE DOP GL Poland CNBOP