This kit to help you check out the UV light strength of your printers. Probe type:P405L1 Probe size:36x36x13.8mm response range:405nm±3nm Test hole diameter:φ=10mm Power range:0-50000μW/cm² Measuring accuracy:±10% Input:5V USB NOTE: It requests a 5V voltage supply, the is to use the board USB port directly before you go to print. Keep away from resin. If resin leaks on the probe, clean it with with cotton. Extreme temperatures above 70℃ and below -10℃ can impact measurements, use in the indoor environment only. Most 3d printers use come with different screens and light sources. Because of the differences between UV light and screen transition rate, It is normal you get different data in different test points. Color:Black Material:ABS Package Contents: 1 * 3D Printer UV Light Meter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.