It is normal if using Kyosho KT-200. Mine from Kyosho Sand Master RTR is the same - range just about 20m (or less). Even the cheapest China brand 2.4G eg. Flysky GT2 has a much better range. I suggest you can choose Flysky GT3C just over HK$300. China brand 2.4G radio is not bad, considering their very low price, especially if you will buy more receivers (at around HK$70 each)