Purpose: Keep food fresh and dry. Specification: Material: High-quality ABS material, resistant to high and low temperatures. Non-toxic and durable. Size: 9.7 cm * 3 cm. Battery: 1.5 V, 2 AA batteries, alkaline batteries only (not included). User Manual: 1. The device does not generate heat immediately after new batteries are installed. Press and hold for 3 to 5 seconds to activate heating. 2. Use only new batteries. Do not mix battery polarities. Ensure batteries are correctly installed; otherwise, the device will not generate heat. 3. After proper battery installation, press and hold the device for 3 to 5 seconds to initiate heating. 4. For thicker plastic bags, move the bag slowly through the device to allow even heat distribution for optimal sealing. 5. There is no need to remove the batteries after use. To disable power, slide the hook between the device to disconnect the contact points of the metal parts. Tips: Avoid applying excessive pressure to the device, as this may deform or damage the heating elements. The plastic bag must be clean and free from oil or moisture before sealing.