Etiger Luxury S4 Wireless Pstn/gsm Double Network Security Alarm System Home Security Alarm System LCD Display Security Kit With Andriod/ios App(White) Anysun S4 Dual network(GSM, Landline/VoIP) for double protection of your home or property at the same time. Wireless security system with GSM and landline transmitter Protecting your home when you're away has never been this easy with wireless alarm system. Stay in contact with your home at all time: the whole alarm system can be controlled from distance on your phone, wherever you are. Easy as a mobile phone In GSM mode Control and set up your alarm system from your smartphone with the iOS and Android apps. Arm it, disarm it, and set it up on your mobile phone, anywhere you are. Requires a SIM card, sold separately. User-friendly setup menu Plugged to your landline Set up your alarm system and your accessories in a few seconds thanks to the menu displayed on the LCD screen. You can control the system at all times from any phone to arm or disarm the system, be informed in case of alarm or listen to what is happening at home. Have it your way Landline and GSM transmitter The S4 Combo Secual can be either plugged to your telephone landline and work with a SIM card (on GSM networks). Build the system you need Customizable system Up to 50 sensors can be added to your system without having to pull one single cable: motion detector, door contact, additional siren, keypad. Anything you need to strengthen the protection of your home.