【EASY TO USE】:This RF signal detector is easy to use, efficiently find the suspicious item. 【DUAL ANTENNA】: The detector is an upgraded version with dual antenna. Dual band combine with professional radio waves, so it can search faster signal from 300MHZ to 2700Mhz, RF antenna for low frequencies(300mhz ~ 800mhz) and GSM antenna for high frequencies(800mhz ~ 2700mhz), the anti-interference ability is stronger, and unlocking azimuth distance detection is more accurate;.
eBay