Practical design: The built-in sensor system in the portable mini scale gives you instant and accurate results; the product's maximum weight is 200 grams and the weighing accuracy can reach 0.01 grams; LCD display and tare function Easy-to-read electronic scales for a variety of uses: The portable mini electronic scale can weigh a variety of small and light objects for food, gemstones, coins, jewelry, gold, etc.; it contains 4 necessary units of measure for easy weight conversion and can quickly switch between units of measure material and size with g, tl, dwt and ct: Mini portable electronic scale made of high-quality metal and plastic housing, durable and portable; its dimensions are approximately 2.5 x 1.3 x 0.6 inches / 64 x 34 x 15 mm, small and light, easy to use; Caution: This product does not contain batteries GREAT SWEET GIFT: Portable electronic scale is small, delicate and easy to use, perfect as a gift for family, friends or classmates; They will be happy to receive such a gift package contains: You get 4 mini scales (batteries included) that look like car keys, stylish and simple; advanced sensor technology provides fast, accurate response, often attached to keys, easy to carry Product packaging quantity: 4 Features: Practicality: this car key-shaped electronic scale can be hung on a keychain for easy portability. LCD display with blue backlight for easy reading. Exquisite style, practicality and wide range of use. Precautions: 1. The margin of error is within 0.005 g. 2. Use the scale in a windless and stable environment. 3. Calibrate and tare the scale before weighing. 4. Keep away from speakers and other magnetic devices.