[Product Description] have a signal interference and cause read error with a great component or back shell used in metal, IC card in your smartphone on the market. Cell phone or place an IC card and between you and this product can help to increase sensitivity and read by it, and to prevent the epidermal effect of electromagnetic waves and metal. [Please note] This product is used in conditions like, tested to meet the most of its IC Reader Frequency, such as the influence of the external environment, electromagnetic interference, the effect of the use of this product is different. The strength, sensitivity, and IC card, etc., easy to install position Please note that the following information on it. 1. Smart Phone and placed in between the IC card, please make it to ensure precise placement. 2. Effect is good and if you dont, you can get close to the bottom of the cell phone to the 2 panels are available in this product helps to? Trying to change, its a place to keep your test at the same time. 3. 2 PCs to be placed in between the IC card and you are disabled. They know what theyre doing.