When it comes to accuracy, digital is key. Scales are the simplest tool for helping in managing your weight, tracking your diet results, and maintaining your overall health with the added support of the Trackstar app. Simple to use out of the box, simply remove from packaging, install included batteries and set measurement mode (lbs or kg) with a button on the underside, place on a hard surface and step on. Always read instructions for use including safety warnings prior to first use; never use scales on a carpeted surface, with wet feet, or while wearing socks. Tempered glass is easy to clean and maintain.