Wilson Electronics have a reputation for constructing reliable high-performance amplifiers. The 801201 is a wireless dual band in-vehicle repeater with 40db gain. This product comes with an interior low profile antenna that will rebroadcast the amplified cell signals throughout your car or truck. The amplifier is powered through your cigarette lighter socket with the aid of the supplied power adapter. An AC power supply is optionally available should this be required. This amplifier also comes with the option of attaching directly to your mobile phone through a wired connection and velcro attachment. When used in this way as a 'direct connect' amplifier it may prove more reliable as the antenna is contiguous to your phone. However, the drawbacks are that the wireless functionality is sacrificed in this mode of usage e.g. only one phone can be connected at a time and you lose the mobile freedom of the wireless mode.