Size: 30 * 30cm Additional functions: Temperature measurement Model: BL-300A Board material: tempered glass Shape: round Energy Source: Battery Safety And Comfort: Strong material weighing platform supports up to 400 lbs/180 kg. Elegance and simplicity design with extra large easy-to-read LCD backlit screen, easy to read even in the most dimly lit areas. Hassle-Free Measuring: Step-on Technology tells your accurate weight right away. With Auto-On/Off function, it is easy to activate the scale perfectly by tapping this weight scale and save battery life. Convenient use: Auto-zero, auto on/off, low battery and overload indication make the measurement more convenient and efficient,with backlit LCD.