This kit includes everything you need to protect a large sized home, office, warehouse or retail store - including the award-winning Chuango H4 LTE Security Hub with built-in WiFi and (optional) wireless 4G communication. Easy DIY installation - expand your system now or in the future. Includes free app for Apple or Android which can be shared with up to 10 family members, friends or staff. Compatible with Amazon Alexa and Google Home voice control. Kit includes: 1 x H4 LTE Security Hub, 5 x Wireless Motion Sensors, 3 x Wireless Door / Window sensors, 1 x Wireless Indoor Siren, 1 x Mains Powered outdoor Siren and 4 x Keychain Remote Controls.