RXTi2 Hearing Loop Listener Excl Batteries and 3.5mm HeadmicThe RXTI2 Induction Loop Receiver allows the user to monitor audio signals transmitted from an assitive listening loop system to test and assess the quality of the signal being transmitted. Product Features Test and assess the signal from a hearing loop system Soft start function 50Hz filter (to cut out mains hum pick up) Light and compact 3. 5mm headphone jack Take 2 x AAA batteries (not included)