Features: - Detects movement using PIR sensor and reports it to your iOS device. Blink of LED indicates detected motion. Color of blink is dependent on current ambient temperature (smooth transition through blue, green and red). Brightness of blink is adjusted by TechInfo: Power supply: 3.0V DC battery Battery type: CR123A EU directives 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) Recommended installation height: 2.4 meters (7.87 feet) Operating temperature: 0-40°C (32-104°F) Temperature measuring range: 0-40°C (32-104°F) Temperature measuring accuracy: ±0.5°C (±0.9°F) Light intensity measuring range: 0-32000 lux Dimensions (diameter): 46 mm (1.8 inch) Warning: Using batteries other than specified may result in explosion. Dispose of properly, observing environmental protection rules.