Features: Two weighing units: kg / lb. With automatic zero tracking and tare function. Data holding: when you are weighing items， the LED will flicker until scale gets a fixed data. LCD screen display with green backlight. Low power and overload indication. One key design， simple and easy to use. Automatic power off after it is idle for about 120 seconds. Manually power off by long pressing the button. Fast response and stable performance. Tested and pre-calibrated， ready to use.Specifications: Material: ABS， nylon Color: Black Capacity / accuracy: 40 kg / 100g Units: kg / lb Auto power-off: 120 seconds Power supply: 1 * 3V CR2032 battery (not included) Product size: 10 * 4 * 3 cm / 3.9 * 1.6 * 1.2in Product weight: 50g / 1.8oz Package size: 10 * 5 * 4.3cm / 3.9 * 2 * 1.7in Package weight: 63g / 2.2ozPackage include: 1xPortable Electronic Luggage Scale