Kit theory test distance of about 5-8 meters, but the practical application depends on the ambient factors you use, as well as the middle barrier, receiving head with HX1838, with red power work instructions lights, receive 38K frequency any remote coding data.
The remote controller has 3×7 keys, include 0-9, 100+, 200+ numerical key, CH+, CH, CH-, PREV, NEXT, PLAY/PAUSE, VOL-, VOL+, EQ.