| Brand | Ring |
|---|---|
| Type | Door Sensor |
| Power Source | Battery |
| Color | White |
| Item Diameter | 2.5 in |
| Features | Wireless, Battery-Operated, No Tools Required |
| Material | Plastic |
| Operating Sound Rating | 130 dB |
Check the listing for details. Ring Alarm Contact Sensor (2nd Gen) 1-Pack - White NIB. Color: White, Condition: New. Listed at 14.99 USD. The Ring Alarm Contact Sensor (2nd Gen) 1-Pack in White is a wireless door sensor that operates on battery power. With no need for tools, this sensor is easy to install and features a 130 dB operating sound rating for added security. This is brand new in box and unused from a kit. Ships next business day.