The price is for one item. For the default card-packaged set of two, you need to order 2 or a multiple of 2. Thank you Valve lights may occasionally fail to light up and have a certain defect rate. We do not offer replacements or refunds, so please choose carefully when purchasing! The current product price is for a single item. They are packaged in a card box, with two items per pack. Please make sure you are clear about this when placing your order. If you have any questions, you can contact customer service for clarification [Product Name] Fluorescent Stick-Type Fire Wheel Valve Light [Material] Half aluminum, half plastic [Circuit] Independent circuit design, composed of a dynamic sensor circuit and a lighting circuit [Color] Red, yellow, green, and blue; the LED bulbs inside emit light of the corresponding color [Packaging] Color Card Blister Pack [Power Supply] 3 AG10 button batteries (included with the product) This type of wheel is a single-sensor vibration type, meaning it lights up when the wheel turns, and it looks very beautiful when it turns B: Exquisite craftsmanship C: Just screw it onto the valve of the car wheel Attention all buyers: 1。When using the product for the first time, be sure to unscrew the back cover and remove the insulating strip between the battery and the spring or in the middle of the battery, otherwise it will cause a short circuit and will not light up! 2。In the first step, pay attention to the orientation of the battery and make sure not to install it upside down!! 3。This light has a condition that it is activated by vibration; it will flash when there is vibration, but it does not light up when it is relatively still