My child used this a few times from newborn to around 3 months old ^_^ Operation has been confirmed. Batteries are included, so you can use it immediately upon arrival. Digital baby scale that can measure up to 20kg, with TARE function. - Model Name: Digital Baby Scale - Maximum Weight: Up to 20kg - Display: Digital display - Color: White - Functions: ON/OFF, TARE function - Condition: Unused, in package Thank you for looking.