Cisco Meraki MT20 open/close sensor - Monitors entrances and exits plus the status of doors, cabinets, gates and much more - Easy installation - Flexible alarm notifications via e-mail, SMS and push - Battery-powered (AA) - Incl. assembly material - Compatible with Meraki MR36, MR45, MR46, MR46E, MR55, MR56, MR76, MR86 Wi-Fi 6 access points and Meraki MV12, MV32, MV22 and MV72 series network cameras Requires a licence to use (see accessories). Other validity periods (1 - 10 years) are available.