... 831Power Supply: AC 110V - 220V, DC 9V; Built-in Ni-Cd (rechargeble battery),DC 7.2VWorking Current: less than 50mAAlarm Current ... Detector: 20 units per wireless zoneAlarm Mode: by telephone, by remote controller, by keypadProduct Kit: Alarm panel (1),wireless magnetic Contact ... (1),wireless sensor (1),Wireless Remote Control (2),adapter (1)Main Features1. The panel with ...