Package Dimensions:10.9 x 8 x 1.4 cm; 40 Grams Size:4PCS Number of Items:2 Quantity:1 batteries required:No Batteries Included:No Item Weight:40 g welcome to my store , Hope you have a pleasant shopping trip! Features:1.How to Use: Put the card at the irradiation point under the UV lamp (within a distance of 5CM/2.0inch) to check whether the lamp is available.2.Easy to Test: 10S detection measures UV. The reaction area shows purple to indicate that the bulb contains UV value, if the card does not change to purple, the bulb needs to be replaced.3.Reusable: UVB Tester Card can be reused 500 times, which is convenient and time-saving.Specifications:Size: 86mmx54mm/3.4inchx2.1inchDetection time: 10 secondsBulb: Suitable for 3.0 ~10.0 UVB bulbs and fluorescent bulbsPackage List:4PCS X UVB Tester CardNotes:1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures.2. Please allow 1-2cm slight dimension difference due to different manual measurement. How to Use: Put the card at the irradiation point under the UV lamp (within a distance of 5CM/2.0inch) to check whether the lamp is available. Easy to Test: 10S Detection Measures UV. The Reaction Area Shows Purple to Indicate that the Bulb Contains UV Value, If the Card Does Not Change to Purple, the Bulb Needs to Be Replaced. Reusable: UVB Tester Card Can Be Reused 500 Times, Which Is Convenient and Time-saving. Applicable: The Size Is 86mmx54mm/3.4inchx2.1inch, Suitable For 3.0 ~10.0 UVB Bulbs and Fluorescent Bulbs. SHOP WITH CONFIDENCE: To Provide You With the Highest Quality Service, If You Have Any Question, Please Feel Free to Contact Us.We Will Provide After-sales Service Until You Are Satisfied. See more product details How to Use: Put the card at the irradiation point under the UV lamp (within a distance of 5CM/2.0inch) to check whether the lamp is available. Easy to Test: 10S Detection Measures UV. The Reaction Area Shows Purple to Indicate that the Bulb Contains UV Value, If the Card Does Not Change to Purple, the Bulb Needs to Be Replaced. Reusable: UVB Tester Card Can Be Reused 500 Times, Which Is Convenient and Time-saving. Applicable: The Size Is 86mmx54mm/3.4inchx2.1inch, Suitable For 3.0 ~10.0 UVB Bulbs and Fluorescent Bulbs. SHOP WITH CONFIDENCE: To Provide You With the Highest Quality Service, If You Have Any Question, Please Feel Free to Contact Us.We Will Provide After-sales Service Until You Are Satisfied.