smpl Door Alert Kit is simple to install and use. The wireless Sensors include a pre-installed battery and double-sided tape for installation in minutes. The smpl Pager and Door Sensor is paired right out of the box. No internet, Bluetooth, wiring or any additional fees are required.
The portable and vibrating Pager can be clipped to a belt, fit in your pocket, or simply placed on a table. The Pager requires 2 x AAA batteries, not included.