Dear friend, please believe me, this product can really be used. It requires a certain amount of patience and skill to use. You must first ensure that the battery is new and has enough power, and then check whether the battery is installed correctly, and slide it slowly when using it. If we encounter problems, we can resolve them through negotiation. If the product is really damaged by the logistics provider in the process of violence, our company will definitely be responsible. Please be patient and try it many times when you use it, thank you for your understanding.Please note: the battery needs alkaline batteries, please pay attention to whether the batteries used are alkaline batteries. Description: 100% brand new and high quality Easy, convenient to use and storage, great ideal for home use. Perfect reseal unused portions of food, keep the food in freshness. It simply slides it along the edge of any bag and it's sealed airtight. Protection against the moist. Solid and durable Material: ABS+ stainless steel Product size:3.5*1.5*2.3inch (9*4*6CM) Color: white/pink Power: 2*AA battery(Not included) Scope of application: Fresh plastic bag Ordinary plastic bag snack bag Laminated bag Package Included: 1 * Food Bag Sealing Machine（ battery not included） Notes: 1.Can not use on the pure paper bag 2.Cover the protective case after use, prevent scald you. 3.It is necessary to start sealing after press for a few seconds. 4.The speed of sealing can not be too fast, otherwise it will affect the sealing effect. 5.Use 2*AA batteries.(battery not included ) 6.the bag thickness larger than 0.1cm is hard to sealing, you can slowly sealing or repeat it several times. 7.Thinner cling film needs to be folded several layers and the sealing effect will be better, or we should seal quickly. If because the package is too thin and we fusing a crack still ok, the opening also be sealed. 8.The plastic smell emanating from the heat seal is normal, not the quality problem of the sealing machine. 9.Clean the dust, water, powder, oil and so on at the opening when sealing. 10.Cannot be used continuously for more than 1 minute, To avoid overheating the battery