✅Ideal Alpha Alarm System for Home - With the help of smart ecosystem, you can add extra door and window sensors, motion detectors, wireless doorbell, and water detectors into the existing smart security system. Remotely control tolviviov home alarm system wireless anywhere, anytime via smartphone. It supports expansion of up to 20 sensors and 5 remote controls/keypads. No contracts and No subscription fee. | ✅Early-Warning Notifications - When someone illegally opens your door or window and enters your house or apartment. tolviviov smart door sensor will send an alarm to the alarm station, and your mobile phone will receive a real-time notification of alarms alert. Equip every door and window with tolviviov wifi door sensor to stop burglar. tolviviov home security systems always give you peace of mind. | ✅VOICE CONTROL - Your tolviviov alarm system for apartment can be easily controlled by Away, Disarm, and Home modes with your voice. Works with Alexa and Google Assistant. Only works on 2.4GHz WiFi networks, does NOT support 5GHz WiFi networks. | ✅DIY INSTALLATION - The tolviviov Smart Alarm System makes installation much easier than any previous version so that you can enjoy tolviviov security alarm system within minutes. No professional is required. The wireless connection devices does not damage the wall. The alarm station should ALWAYS CONNECT to AC adapter. The backup battery works for 8 hours, only as an emergency battery. | ✅BUY with Confidence - The smart security system comes with a base station, 2 remotes, 9 contact sensors. tolviviov home alarm system can be used not only for your house or apartment, but also for offices, garage, shops, stores, condos. etc. No Monthly Fee. No Contacts.