4 wire or 3 wire 4G GPS Tracker

If you look up inadvertently in the subway station, you will find that the mushroom head-shaped thing is firmly attached to the ceiling. What is it used for?These small mushroom heads are actually part of the subway wireless communication system, called indoor ceiling antennas, which cover the indoo   Read More>

text something to introduce yourself!   Read More>

Concept: Unmanned aircraft, or UAV for short, is an unmanned aircraft that is operated either completely or intermittently autonomously by a radio-controlled device and self-contained program control device.Function: The Drone antenna is responsible for the signal transmission and reception between   Read More>