Opple Light Master 3 Flicker Tester

Measures flicker frequency, modulation depth, and flicker index Provides flicker risk assessment according to IEEE 1789 Measures illuminance (lux), color temperature (K), and CRI Easy connection via Bluetooth Compatible with iOS and Android Built-in battery, charges via Micro USB (cable not included) Link to iOS app: https://apps.apple.com/app/light-master/id1077969059 Link to Android app: https://play.google.com/store/apps/details?id=com.opple.lightmasterpro Device Dimensions (collapsed): 2.5 x 1.5 x 1 inch Device Dimensions (extended): 3.5 x 1.5 x 1 inch Device Weight: 1.4 oz Packaging Dimensions: 2.5 x 2 x 2 inch Weight with Packaging: 2.2 oz