Type : as shown , 1 . Portable : equipped with durable steel belts and hooks , convenient for suitcases and parcels , etc . , self-locking weight , reset / tare function . 2 . Avoid overweight charges : hook your backpack to get instant weight , no more accidental luggage or luggage charges . 3 . Wild use : Calibrate the weight of products when shopping in supermarkets , farmers markets or convenience stores .