Free App with 19 Nutrients Tracking, Calorie, Marco, Digital grams and ounces for weight loss, Premium Stainless SteelEasily track your intake of up to 19 nutrients, monitor trends, create daily, weekly and monthly nutrition reports and more by connecting to the free Vesync app, Apple Health and Fitbit. Supported by Nutritionix, which holds about 1 million food data. Choose units from oz/lb:oz/g (water & milk)/ml (water & milk), and the Tare button tells the exact weight of your food without container. 3 x 1.5V AAA batteries included (non-rechargeable, not lithium batteries)