PSTG0-900/1900HKS quarterwave stubby antennas operate on US Cellular & GSM/CDMA bands for Machine to Machine Communication.
They offer high performance with a minimum of size. The helical design of the antennas results in a compact length that is only 1.75 inches (45 mm) long.
The tough polyurethane radome resists impact damage.
There are a number of related models with the same mechanical specs, but covering different frequency bands.