Mail feature:  -The Newest IPS UI Interface:  We have added IPS technology to the UI interface of this H500-2G product. The 'IPS', called 'Super TFT', is an upgraded version of TFT. Compared with TFT: The 'IPS' has a large viewing angle. Color reproducted is more accurate. No water ripples when touched. Environmental protection and energy saving.  -600MHZ High-Speed Smart Chip:  This H500-2G uses 600MHz High-Speed Smart Chip. The operating speed of this H500-2G is 12 times that of other similar alarm hosts(50MHz). So the running speed of this E800 is faster and smoother.  -12mm Ultra-thin body:  -Support OTA online upgrade:  We will continue to release feature updates and stability upgrades, and you can get free updates via OTA online upgrades when necessary. Note: Most similar products do not have OTA online upgrade capabilities, and can only repurchase new product to obtain upgrades.  -Bulit-in 10 languages:  English/ Nederlands/ Spanish/ Russian/ French/ Polish/ German/ Italian/ Portuguese/ Chinese.  -Support Alexa and Google assistant, Tuya Smart & Smart Life APP:  -Support IOS APP and Android Mobile:  -Two- Way Talk Function:  Family members can communicate and talk through this H500.  When the thief enters your home, the H500-2G will automatically call you. You can remotely stop the thief and let him leave your home.  -5 Groups Preset Alarm Phone Numbers: SMS on/ off and dial on/ off can be set respectively:  The user can set five different phone numbers in the H500-2G.  When an intruder enters your home, the H500 will automatically call these five phone numbers. At the same time, H500-2G will also automatically send text messages to these five phone numbers.  -Low Battery Alarm Reminder Function:  When the battery of the H500-2G accessories (such as door sensor, infrared detector) is low, H500-2G will sound an alarm to remind users to replace the battery.    Specification:  Power: 100V-240V;  Video Interface: Yes;  Display: Yes;  Alarm Type: The Alarm, SMS, PSTN, GPRS, Apps Control;  Product Size: 150mm×120mm×12mm;  Package Size: 207mm×147mm×77mm;  Model Number: Staniot-H500-2G;  Password Keyboard: Yes;  Arming Type: APP;  Connection Type: Wireless;  Zone Number: 200;  Wireless Parameters: 433MHz, eV1527;  Function: 5 alarm phone number;  SMS: Support IOS and Android, Compatible with Amazon Alexa/Google Home/ Tuya APP/ Support 2G WIFI, 4.3 inch full color display, Support 850/900/1800/1900MHz;    Package Contents:  Smart Panel:2G Smart Security Panel × 1;  Kits: 2G Smart Security Panel × 1, Infrared Detector × 1. Wired Siren × 1, Remote Control Button × 2, Door/ Window Sensor × 1;  Notice: 2G function is only making phones calls and sending SMS to the mobile number setted when any alert is detected. The 2G panel can make phone calls and send SMS, even though the WIFI is disabled due to lost external power supply;  The alarm host can communicate with Tuya APP when WIFI is connected;     Battery Description Fridendly Reminder:  1.In order to make it easier for you to use the product as soon as possible after receipt, please prepare the batteries in advance according to the battery specifications and quality indicated in the following picture.  2.