remote controllerFunctions/Features: * Used to armed & disarmed alarm host. * Emergency button for emergency or panic help.specifications:* Operating power: 27A 12V alkaline battery * Wireless Transmitting distance: more than300ft (in open area) * Service life: about 2 years installation and Usage:* Ideal for keychain and to take it when the alarm host in set to AWAY mode. * Press the "AWAY" button to arm before leaving home or in AWAY mode and press the "DISARM" button to disarm. * Press the "HOME" button to part arm or 1st defense line enabling and protecting the perimeters of home at night time before going to sleep.* Please replace the batteries within 2 years of usage or any time when it becomes less sensitive or shorter controlling distan Website:http://www.home-security-life.com