... 2. set the program on the panel directly alarm system wireless Product Model: EB-831Power Supply: AC 110V - 220V, DC 9V ... Sound: 110 dBDefence Zones: 8 (wireless),7 (wired) Capacity of Wireless Detector: 20 units per wireless zoneAlarm Mode: by telephone, by ... , by keypadProduct Kit: Alarm panel (1),wireless magnetic Contact (1),wireless sensor (1),Wireless Remote Control (2),adapter (1)Main Features1 ...