Pro. This SILCA Air4 Home Pro Kit is a universal solution for opening gates and doors remotely, directly from your smartphone. With no wires or Internet required, the easy installation only requires Bluetooth, and a free to download mobile app. This kit can be used on up to 105 smartphones, controlled by up to 5 administrators. The Air4 Home device is resistant to heat, rain and ice, working at temperatures between -20°C and 50°C, and is IP66 certified. It is secure, with 8 digit pincode access, viewable access history, and the option to restrict and revoke access remotely. Batteries (2 x 1.5V type C alkaline batteries) and fixings included.. Easy installation. No wires or Internet needed - operates via Bluetooth 4. Suitable for opening up to 4 garage doors, swinging and sliding gates, barriers and awnings.. Works with up to 105 smartphones, controlled by 5 administrators