2.4 inch TFT full color LCD screen display;Press keyboard operation, wireless transmission, simple installation;One machine with two networks WIF/GSM (2G), permanent network, safer and more reliable;Support doorbell button sound, dingdong, dingdong (default) One-key SOS secret distress alarm; support duress code, can secretly call the alarm in emergency (default alarm tone, can be set);Support 9 languages, Chinese, English, German, Korean, Spanish, Portuguese, French, Italian, Russian (default English). Support remote WIFI network APP alarm push, phone, SMS, and other multi-channel alarm methods and management;Support 5 groups of preset alarm calls and SMS numbers, and support off/on management of each group number;One-click operation to add wireless accessories, no need to divide defense zones, attributes, names, etc.; Support the arbitrary setting of the name and number of the main door, hall, help, bedroom, window, balcony, perimeter, smoke, gas, carbon monoxide, water leakage, doorbell, PIR detector, magnetic door detector, etc. Supports defense zone type settings such as outgoing defense zone, left-arm defense, doorbell, silent defense, 24-hour defense zone; Supports multiple extended alarm display and alarms such as main power failure, back-up battery defect, anti-pry alarm, etc.; Dual horn alarm sound design, built-in speaker (default) support external audio siren (optional);Support free arming and disarming function Support arbitrary input of defense zone fraud numbers; Support timing arming and disarming and message operation; Support telephone function, similar to an ordinary telephone; Support 1 group of user password management (default off) to open see instructions Support IOS Apple system (in 12.3.1 version), Android system (android); colour: white Material: plastic size: 160x100x12.5mm Package Contents: 1*Host 1*CT60M Infrared detector 1*CD101 wireless door sensor 1*RC22 wireless remote control 1*M6 wireless doorbell button 1*USB cable (without charging head) Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.