Product details:

- Keep your home secure with SwitchBot Contact Sensor for doors and windows

- Built-in light and motion sensors trigger actions in the SwitchBot app, like turning on lights or appliances

- Easy to install and place anywhere without tools, and has a long battery life

- Connect with other SwitchBot products to create scenes and automate your home

- Receive alerts on your phone and trigger voice alarms with Alexa to scare off burglars

- Can also be used to monitor medication or pets

- Magnets must be aligned and within 1.2 inches (30mm) of the body for proper function.

Warranty: 1 year.