Features: The Button detects if it was clicked one time, two time or held, then reports it to your iOS device. Automations can be created based on the detected action. The Button measures battery level every 24 hours and reports it to your iOS device. Additionally, if battery level is below 15%, the accessory will report low level battery status to your iOS device. The Button is equipped with a built-in buzzer that signals status of the accessory, like identification (3 triple beeps) or reset confirmation (long beep). If enabled, the accessory can also respond to actions with sound signals. The accessory will confirm number of performed clicks with the same amount of beeps (e.g. two clicks - two beeps). Holding will be signaled with intermittent tone. TechInfo: Power supply: 3.6V DC battery Battery type: ER14250 ½AA Battery life: est. 2 years (max. 10 pushes per day) EU standards compliance: RED 2014/53/EU RoHS 2011/65/EU Radio protocol: Bluetooth® low energy Radio frequency: 2.4 GHz Range: up to 50m (free range) (164 feet) Operating temperature: 0-40°C (32-104°F) Dimensions (diameter x height): 46 x 34 mm (1.81" x 1.34") Warning: Using batteries other than specified may result in explosion. Dispose of properly, observing environmental protection rules.