... GSM, CDMA, 3G mobile phones, cordless phones development, Bluetooth products Product Name: M4070 High Isolation Manual Shield BoxApplication: ... GSM, CDMA, 3G mobile phones, cordless phones development, Bluetooth products and maintenance. Specification: M4070specificationsFrequency(GHz)0.8~6GHZisolation≥ ... to ask.Company environment:Certificates: High Isolation wireless Bluetooth shielding Box(70dB)