1.Crystal - Clear Hose for Visibility: The transparent (hose) allows you to easily monitor the gas flow, ensuring a smooth and worry - free operation. This feature is especially useful for detecting any potential blockages or leaks at a glance.2. Precise Outlet Valve Control: The (outlet valve) is designed for accurate regulation of gas output. It enables you to adjust the gas flow precisely according to your cooking or heating needs, providing optimal performance and energy efficiency.1. You need an inflatable valve, an empty flat tank, a liquefied gas cylinder and an electronic scale.1.For safety reasons, the weight of the refill cartridge should be lighter than the original cartridge!2. Please operate in a ventilated open space.DO NOT use under any circumstances with a flame.3. Secure and Universal (Cartridge Connector): The (cartridge connector) offers a secure connection with gas cylinders. It is compatible with a wide range of standard gas cartridges, ensuring seamless attachment and preventing gas leakage, making it a reliable choice for various applications. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin