We strive for prompt service. Please use the button at the bottom right of the image to negotiate prices. All items are first-come, first-served!! If you are dissatisfied with the product you receive, or if it doesn't work, we will accept returns and refunds! Please let us know before leaving a review. Initial setup may be required, in which case please contact the manufacturer. We generally ship via Yu-Packet Post. Please contact us if you have other shipping preferences. We have confirmed that all buttons emit infrared light. Button response is good ◎ For radio wave types, only power-on or operation is unconfirmed. Please understand. We have cleaned the items, but if you are concerned, please purchase with the understanding that you will need to clean them yourself. Batteries are not included. We recommend contacting the manufacturer for usage instructions and compatible model numbers. Please be sure to check the condition in the photos and understand before purchasing. If you have any questions, please use the comment section.