Bio-Pro chips are small and unobtrusive and are placed on cell phones, computers, and portable phones for protection from radiation. I strongly recommend them for everyone who carries and uses a cell phone, PDA, bluetooth device, lap top, or desk top computer. You can buy them directly from me for $50 each (no charge for shipping). Please contact me if you have any questions about their use and effectiveness. If you are in the office, I can do a simple demonstration of their effectiveness with you own cell phone.