In this paper, a new adapter between fixed-phone and mobile phone based on BlueCore4 is introduced. As is well known, mobile phone radiation damages areas of the brain associated with learning, memory and movement, while the fixed-phone radiation is so little that we can ignore it. Scientists have found that mobile phone radiation can cause many diseases such as panasthenia, dementia and parkinson. Moreover, mobile phone radiation can also kill men’s sperm. The device can turn mobile phones signals to the bluetooth module of the adapter through bluetooth technology, then the signals will be transferred to fixed-phone through signals converter circuit, so the fixed-phone can be used to answer the call from the mobile phone, it will reduce the harm of the mobile phone radiation to human body cells. This device uses bluetooth module BlueCore4 as hardware development platform, and BlueLab3.6.2 as software development tools. Based on bluetooth headset profiles, the adapter can realize audio links.