Practical design: The built-in sensor system of the mini portable scale can provide you with instant and accurate results; the maximum weight of the product is 200g, and the weighing accuracy can reach 0.01g; the liquid crystal display and tare function design, the electronic scale is easy to read Wide range of uses: The mini portable scale can weigh all kinds of light and small items, suitable for food, gems, coins, jewelry, gold, etc.; it includes 4 necessary unit measurements for easy weight conversion, which can be in g, tl, dwt and ct Quickly switch between measurement units Material and Size: The mini portable scale is made of high quality metal and plastic case, durable and portable; its size is about 2.5 x 1.3 x 0.6 inches / 64 x 34 x 15 mm, small and light, easy to use; Note: This product does not contain batteries GREAT CUTE GIFT: The portable electronic scale is small and exquisite, easy to use, and perfect for a gift to a family, friend or classmate; they'll be delighted to receive such a gift PACKAGE INCLUDES: You'll get 4 pieces of mini scales (with battery) that look like car keys, stylish and simple; advanced sensor technology provides fast, accurate responses, often linked to keys for easy portability Quantity of product packaging: 4 Features: Strong practicality: This car key-shaped electronic scale can be hung on the key chain and is easy to carry. LCD display with blue backlight for easy reading. Exquisite style, strong practicability and wide range of use. Precautions: 1. The error range is within 0.005g. 2. Please use the scale in a place with no wind and stable environment. 3. Please calibrate and tare before weighing. 4. Please keep away from speakers and other magnetic devices.