求翻译：3.LED灯光亮度调节：是用大拇指轻按在兔身体正中心心型处三秒左右，就能随意调节LED灯光亮度。当调到您理想的光线时放开手。是什么意思？

3.LED brightness of lights: is the thumbs touch rabbit body is at the heart of the Centre in about three seconds, you can freely adjust the Brightness LED lighting. Let go when the light adjustable to your ideal.