Some models come with both radio and satellite frequency (models with 406 Mhz and 121.5 Mhz capability) which means that when a rescue helicopter gets close, they can tune into the radio network and ...

At present, with the progress and innovation of technology, the radar communication dual function wave has become a hot research at home and abroad. Excellent integrated waveform can make full use ...

The first phone in the world that works on North American CDMA networks and also GSM networks overseas. This stylish clamshell phone also sports a VGA camera with flash (A790 only), dual color ...

Hebei Provincial Key Lab of Green Chemical Technology and High Efficient Energy Saving, Hebei University of Technology, Tianjin, China. Ionic liquids, due to their strong dissolving capacity, ...