Mobile phone is our constant companion and thus expose us to constant Electrosmog emitted from mobiles. These Electrosmog have serious health effects. With Envirochip you can be sure of using mobile phone without any worry STAR LIFE is CE certified. Works equally well when used over a mobile cover or case. Does not interfere with the phone signals ensuring no adverse impact on signal strength. Compatible with all smartphone and feature phone brands. Disclaimer: It is recommended to use the Envirochip on the phone cover if your phone has a matte, glass, metal matte, or fiber glass matte finish as the adhesive on the STAR LIFE may not stick properly to these surfaces. Compact, non-intrusive design with easy application & adhesive for stronger grip and durability.