... Money back guarantee+ refund policy *Shippment:2days *CE&ROHS RF Signal Detector-------Detect all, protect you Worried about you privacy? ... mode. Adjust sensitivity of the RF signal to the highest, and find out the RF signal, when RF signal become strong and closer, adjust ... mode. Adjust sensitivity of the RF signal to the highest, and find out the RF signal, when RF signal become strong and closer, ...