Strike Alpha Cradle for Samsung Galaxy S3 Strike Alpha Cradle for Samsung Galaxy SIII with secure charging, antenna connection and pass through connector included. Packaged for a professional installation through your installer. Boost your Signal! Internal passive antenna is specifically tuned to boost your mobile signal. Comes with FME male for external antenna connection. This Alpha Cradle car holder is the professional installation version. A professional installer will attach the cradle to the swivel mount provided and connect the power pack to your car battery. You then have the freedom to go further and talk longer. The most durable design yet! The Strike Alpha cradle has been designed in Australia specifically for tough conditions. The Strike Alpha cradle boasts the most durable cradle design for temperamental climate, rough road conditions and user wear and tear. The phone slides perfectly flush onto the back of the cradle allowing for maximum signal boosting from the internal antenna.