MOTION DETECTION TECHNOLOGY: The motion sensors, when dark, detect movement. When movement is detected, LED lights turn on for 30 seconds. The bath scale comes with 2 high-quality LED lights to provide lighting in a dark environment. TWO-MODE CONVENIENCE: To disable sensors and prolong battery life, use the switch on the base of the scale. Slide the switch to turn on/off the sensor. Under light to everyday use, the estimated battery life minimum is 1 year. However, if the motion & light sensors are left on and activated many times per day, the life of the batteries will be much shorter—3 AAA batteries (included). INNOVATIVE DESIGN: Designed with four precision sensors, it ensures the best accuracy and highest standards. This 12.2" x 12.2" large, durable tempered glass platform comes in a bright white finish with brushed stainless steel accent edges. The modern, clean design can easily fit into any decorative setting. HIGH CAPACITY: Extra-High Capacity 440 lb (lb/kg/st) in 0.2lb increments USA BASED: In-house design, marketing, engineering, and service teams are here in the US