1. Download Spectrum Wizard APP to your mobile phone 2, through the lighting passport Pro Bluetooth and mobile phone Bluetooth connection 3. Turn on the LED light and start testing with Illuminated Passport Pro. 4. You can see the stroboscopic index, stroboscopic percentage, and strobe frequency of the LED light on the mobile APP. Tips: This test method must be used in conjunction with the Lighting Passport Pro. Jacquard Table Cloth,Printed Table Cloth,French Table Linen,Lavenders Table Linen Jinan Huatian Leinuo Trade Corporation Ltd. , https://www.huatianleinuo.com