https://www.acantcomm.com/products/433mhz-mobile-antenna-with-strong-magnetic-base-ac-q433i08/
433MHz Mobile Antenna With Strong Magnetic Base (AC-Q433I08)
This antenna operating in 433 MHz frequency range.
Designed to be a surface magnetic vhf mobile antenna that performs well on metallic surfaces, Small enough to be used indoors and outdoors, the antenna performance has been designed to take advantage of any metal plate (ground-plane) it attaches to deliver best of class performance.