... and remote monitoring in shops, villas, financial offices and departments of electricity, petroleum, coal, government, public security and other unattended ... frequence ,900/1800/1900 MHz,so it is available all over the world.4.What is the warranty and delivery time? ------ We provide ... 1 siren, 2 remote controllers, 1 power supply, 1 manual GSM Wireless SMS alarm systems with LCD Security Auto-dial