The green MESH Button tag can be used as a button switch. You can shape a simple idea like that, where pressing a button on a tag causes something to happen.
Specifications
Maximum external dimensions (width x height x depth) approx. 24 mm x 48 mm x 12 mm
Weight: about 13 g
Communication Methods Bluetooth Standard Ver. 4.0(Bluetooth Low Energy)
Maximum communication distance: Approx. 10 m
Li-ion battery with integrated power supply
External interface Micro USB (charging only)
App compatible OS/model: iPad 3rd generation or later, iPad mini, iPhone 4S or later, iPod Touch 5th generation or later with iOS 8.0 or later
Starting with Android 5.0, the Bluetooth standard Ver. 4.0 (Bluetooth Low Energy) on tablets and smartphones
Windows 10 Creators Update (1703) or later on devices with Bluetooth 4.0 (Bluetooth Low Energy)