The probably most perfect coffee scale for professional baristas and coffee geeks. Ultra sensitive and fast reacting, waterproof, auto-tare functin, auto-timer function, rechargeable (micro-USB port), and beautifully designed. Connects to mobile apps via bluetooth to track your brews. Accuracy of 0.1g up to 2kg. Works on the drip tray of your espresso machine to weigh your shots during extraction. Including: Calibration weight 100g, protective pad, charging cord.