Ring Alarm Contact Sernor - 2 Pack (2nd Gen)

**Get real-time notifications the moment doors or windows open in your home. Now with a more compact design and slim removable magnets for easy installation, even when space is limited.** - Easy, tool-free installation. - Mounts to doors and window frames. - 4 x CR2032 Lithium Coin Cell 3V - Alexa can notify you when your Ring Alarm Contact Sensors and Motion Detectors are running low on batteries. Requires Ring Alarm Base Station. Compatible with 1st and 2nd generation Ring Alarm devices and accessories. Manufacturer Warranty - 1 Year